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Our analysis confirms that unequal exchange is a significant driver of global inequality, uneven development, and ecological breakdown.

Today, we are told, the world economy functions as a meritocracy: countries that have strong institutions, good markets, and a steadfast work ethic become rich and successful, while countries that lack these things, or which are hobbled by corruption and bad governance, remain poor. This assumption underpins dominant perspectives in the field of international development (Sachs, 2005, Collier, 2007, Rostow, 1990, Moyo, 2010, Calderisi, 2007, Acemoglu and Robinson, 2012), and is reinforced by the rhetoric, common among neoclassical economists, that free-trade globalization has created an “even playing field”.

Emmanuel and Amin argued that unequal exchange enables a “hidden transfer of value” from the global South to the global North, or from periphery to core, which takes place subtly and almost invisibly, without the overt coercion of the colonial apparatus and therefore without provoking moral outrage. Prices are naturalized on the grounds that they represent “utility”, or “value”, or the outcome of “market mechanisms” such as supply and demand, obscuring the extent to which they are determined by power imbalances in the global political economy. Price differentials in international trade therefore function as an effective method of maintaining the patterns of appropriation that once overtly defined the colonial economy, allowing blame for “underdevelopment” to be shifted onto the victims.

Historians have demonstrated that the rise of Western Europe depended in large part on natural resources and labour forcibly appropriated from the global South during the colonial period, on a vast scale. Spain extracted gold and silver from the Andes, Portugal extracted sugar from Brazil, France extracted fossil fuels, minerals and agricultural products from West Africa, Belgium extracted rubber from the Congo; and Britain extracted cotton, opium, grain, timber, tea and countless other commodities from its colonies around the world – all of which entailed the exploitation of Southern labour on coercive terms, including through mass enslavement and indenture. This pattern of appropriation was central to Europe’s industrial growth, and to financing the expansion and industrialization of European settler colonies, including Canada, Australia, New Zealand and the United States, which went on to develop similarly imperialist orientations toward the South (e.g., Naoroji, 1902, Pomeranz, 2000, Beckert, 2015, Moore, 2015, Bhambra, 2017, Patnaik, 2018, Davis, 2002).

for every unit of embodied resources and labour that the South imports from the North they have to export many more units to pay for it, enabling the North to achieve a net appropriation through trade. This dynamic was theorized by Emmanuel (1972) and Amin (1978) as a process of “unequal exchange”.Emmanuel and Amin argued that unequal exchange enables a “hidden transfer of value” from the global South to the global North, or from periphery to core, which takes place subtly and almost invisibly, without the overt coercion of the colonial apparatus and therefore without provoking moral outrage. Prices are naturalized on the grounds that they represent “utility”, or “value”, or the outcome of “market mechanisms” such as supply and demand, obscuring the extent to which they are determined by power imbalances in the global political economy. Price differentials in international trade therefore function as an effective method of maintaining the patterns of appropriation that once overtly defined the colonial economy, allowing blame for “underdevelopment” to be shifted onto the victims.

Following Dorninger et al. (2021), we use a “footprint” analysis of input–output data to quantify the physical scale of raw materials, land, energy and labour embodied in trade between the North and South, looking not only at traded goods themselves but also the upstream resources and labour that go into producing and transporting those goods, including the machines, factories, infrastructure, etc.

Grounding our analysis in the physical dimensions of unequal exchange is important for several reasons. First, these resources – raw materials, land, labour and energy – embody the productive potential that is required for meeting human needs (use-value) and for generating economic growth (exchange-value). Physical drain is therefore ultimately what drives global inequalities in terms of access to provisions, as well as in terms of GDP or income (see Hornborg, 2020). Second, this approach allows us to maintain sight of the ecological impacts of unequal exchange. We know that excess energy and material consumption in high-income nations, facilitated by appropriation from the rest of the world, is causing ecological breakdown on a global scale. Tracing flows of resources embodied in trade allows us to determine the extent to which Northern appropriation is responsible for ecological impacts in the South; i.e., ecological debt (Roberts and Parks, 2009, Warlenius et al., 2015, Hornborg and Martinez-Alier, 2016).

Due to the growing fragmentation of international commodity chains, monetary databases on bilateral gross trade flows have been criticised for not accurately depicting the monetary interdependencies between national economies (Johnson and Noguera, 2012), i.e., the amount of a countries’ value added that is induced by foreign final demand and international trade relations. Trade in Value Added (TiVA) indicators Johnson and Noguera, 2012, Timmer et al., 2014 are designed to take into account the complexity of the global economy. The TiVA concept is motivated by the fact that, in monetary terms, trade in intermediates accounts for approximately two-thirds of international trade. Imports (of intermediates) are used to produce exports and hence bilateral gross exports may include inputs (i.e., value added) from third party countries (Stehrer, 2012). TiVA reveals where (e.g., in which country or industry) and how (e.g. by capital or labour) value is added or captured in global commodity chains (Timmer et al., 2014).

TiVA, which is sometimes referred to as the “value footprint”, is the monetary counterpart of the MRIO-based environmental footprint because both indicators follow the same system boundaries, i.e., all supply chains between production and final consumption of two countries including all direct and indirect interlinkages. Moreover, in contrast to global bilateral monetary trade flows, TiVA is globally balanced, meaning that national exports and imports globally sum up to zero. This is an important feature of the TiVA indicator that facilitates more consistent and unambiguous assessments.

for every unit of embodied raw material equivalent that the South imports from the North, they have to export on average five units to “pay” for it

For land the average ratio is also 5:1, for energy it is 3:1, and for labour it is 13:1

Table 1. Resource drain from the South.ResourceNorth → South flows 2015South → North flows 2015Drain from South in 2015Cumulative drain from South 1990–2015Raw material equivalents [Gt]3.3715.3912.02254.40Embodied land [mn ha]527.421,349.01821.5932,987.23Embodied energy [EJ]21.5543.5121.06650.34Embodied labour [mn py-eq]31.11219.22188.125,956.62

in the year 2015 the North’s net appropriation from the South totalled 12 billion tons of raw materials, 822 million hectares of land, 21 exajoules of energy (equivalent to 3.4 billion barrels of oil), and 188 million person-years equivalents of labour (equivalent to 392 billion hours of work). By net appropriation we mean that these resources are not compensated in equivalent terms through trade; they are effectively transferred gratis. And this appropriation is not insignificant in scale; on the contrary, it comprises a large share (on average about a quarter) of the North’s total consumption.

significant consequences for the global South, in terms of lost use-value. This quantity of Southern raw materials, land, energy and labour could be used to provision for human needs and develop sovereign industrial capacity in the South, but instead it is mobilized around servicing consumption in the global North.

Eight hundred and twenty-two million hectares of land, which is twice the size of India, would in theory be enough to provide nutritious food for up to 6 billion people, depending on land productivity and diet composition

material use is tightly linked to environmental pressures. It accounts for more than 90% of variation in environmental damage indicators (Steinmann et al., 2017), and more than 90% of biodiversity loss and water stress (International Resource Panel, 2019). Moreover, as Van der Voet et al. (2004) demonstrate, while impacts vary by material, and vary as technologies change, there is a coupling between aggregate mass flows and ecological impact. Net flows of material resources from South to North mean that much of the impact of material consumption in the North (43% of it, net of trade) is suffered in the South. The damage is offshored.

Industrial ecologists hold that global extraction and use of materials should not exceed 50 billion tons per year (Bringezu, 2015). In 2015, the global economy was using 87 billion tons per year, overshooting the boundary by 74% and driving ecological breakdown. This overshoot is due almost entirely to excess resource consumption in global North countries. The North consumed 26.71 tons of materials per capita in 2015, which is roughly four times over the sustainable threshold (6.80 tons per capita in 2015). Our results indicate that most of the North’s excess consumption (58% of it) is sustained by net appropriation from the global South; without this appropriation, material use in high-income nations would be much closer to the sustainable level.

In consumption-based terms, the North is responsible for 92% of carbon dioxide emissions in excess of the planetary boundary (350 ppm atmospheric concentration of CO2) (Hickel, 2020), while the consequences harm the South disproportionately, inflicting dramatic social and economic costs (Kikstra et al., 2021b, Srinivasan et al., 2008). The South suffers 82–92% of the costs of climate change, and 98–99% of the deaths associated with climate change (DARA, 2012)

Net appropriation of land means soil depletion, water depletion, and chemical runoff are offshored; net appropriation of energy means that the health impacts of particulate pollution are offshored; net appropriation of labour means that the negative social impacts of exploitation are offshored, etc (Wiedmann and Lenzen, 2018). In the case of non-renewable resources there is also a problem of depletion: resources appropriated from the South are no longer available for future generations to use (Costanza and Daly, 1992, World Bank, 2018), which is particularly problematic given that under conditions of net appropriation economic losses are not offset by investments in capital stock (cf. Hartwick, 1977). Finally, the extractivism that underpins resource appropriation generates social dislocations and conflicts at resource frontiers (Martinez-Alier, 2021).

the value of resources and labour cannot be quantified in dollars, and there is no such thing as a “correct” price.

Prices under capitalism do not reflect value or utility in any objective way. Rather, they reflect, among other things, the (im)balance of power between market agents (capital and labour, core and periphery, lead firms and their suppliers, etc); in other words, they are a political artefact

While prices by definition do not reflect value, they do allow us to compare the scale of drain to prevailing monetary representations of production and income in the world economy.

Fig. 2 shows that drain from the South in 2015 amounted to $14.1 trillion when measured in terms of raw material equivalents, $5.1 trillion when measured in terms of land, $3.6 trillion when measured in terms of energy and $20.3 trillion when measured in terms of labour.

Over the period 1990–2015, the drain sums to $242 trillion (constant 2010 USD). This represents a significant “windfall” for the North, similar to the windfall that was derived from colonial forms of appropriation; i.e., goods that did not have to be produced on the domestic landmass or with domestic labour, and did not have to be bought on the domestic market, or paid for with exports (see Pomeranz, 2000, Patnaik, 2018). While previous studies have shown that the price distortion factor increased dramatically during the structural adjustment period in the 1980’s (Hickel et al., 2021), our data confirms that since the early- to mid-1990’s it has tended to decline slightly. This means that the increase in drain during the period 1990–2007, prior to the global financial crisis, was driven primarily by an increase in the volume of international trade rather than by an increase in price distortion.

Table 3 shows that, over the 1990–2015 period, resources appropriated from the South have been worth on average roughly a quarter of Northern GDP.

the North’s reliance on appropriation from the South has generally increased over the period (despite a significant drop after the global financial crisis), whereas the South’s losses as a share of total economic activity have generally decreased, particularly since 2003, due to an increase in South-South trading and higher domestic GDP creation or capture within the South, both driven largely by China

Aid flows create the powerful impression that rich countries give benevolently to poorer countries. But the data on drain through unequal exchange raises significant questions about this narrative.

net appropriation by DAC countries through unequal exchange from 1990 to 2015 outstripped their aid disbursements over the same period by a factor of almost 80

for every dollar of aid that donors give, they appropriate resources worth 80 dollars through unequal exchange. From the perspective of aid recipients, for every dollar they receive in aid they lose resources worth 30 dollars through drain

The dominant narrative of international development holds that poor countries are poor because of their own internal failings and are therefore in need of assistance. But the empirical evidence on unequal exchange demonstrates that poor countries are poor in large part because they are exploited within the global economy and are therefore in need of justice. These results indicate that combating the deleterious effects of unequal exchange by making the global economy fairer and more equitable would be much more effective, in terms of development, than charity.

In an equitable world, the resource trade deficit that the North sustains in relation to the South would be financed with a parallel monetary trade deficit. But in reality, the monetary trade deficit is very small, equivalent to only about 1% of global trade revenues, and fluctuates between North and South. In effect, this means that the North achieves its large net appropriation of resources and labour from the South gratis.

The question of sectoral disparities has been moot since the 1980s, however, as industrial production has shifted overwhelmingly to the South. The majority of Southern exports (70%) consist of manufactured goods (data from UNCTAD; see Smith, 2016). Of all the manufactured goods that the USA imports, 60% are produced in developing countries. For Japan it is 70%. We can see this pattern reflected also in the industrial workforce. As of 2010, at least 79% of the world’s industrial workers live in the South (data from the ILO; see Smith, 2016). This shift is due in large part to the rise of global commodity chains, which now constitute 70% of international trade. Between 1995 and 2013, there has been an increase of 157 million jobs related to global commodity chains, and an estimated 116 million of them are concentrated in the South, predominantly in the export manufacturing sector (ILO, 2015). In other words, during the period we analyse in this paper (1990–2015), the South has contributed the majority of the world’s industrial production, including high-technology production such as computers and cars. And yet price inequalities remain entrenched.

if Northern states or firms leverage monopoly power within global commodity chains to depress the prices of imports and increase the prices of final products, their labour “productivity” appears to improve, and that of their counterparts declines, even if the underlying production process remains unchanged. Indeed, empirical evidence indicates that real productivity differences between workers are minimal, and cannot explain wage inequalities (Hunter et al., 1990).

wage inequalities exist not because Southern workers are less productive but because they are more intensively exploited, and often subject to rigid systems of labour control and discipline designed to maximize extraction (Suwandi et al., 2019). Indeed, this is a major reason why Northern firms offshore production to the South in the first place: because labour is cheaper per unit of physical output (Goldman, 2012).

the terminology of “value-added” is a misnomer. In international trade, TiVA does not tell us who adds more value but rather who has more power to command prices. And in the case of global commodity chains, TiVA does not indicate where value is produced but rather where it is captured (Smith, 2016).

our analysis reveals that value in global commodity chains is disproportionately produced by the South, but disproportionately captured by the North (as GDP). Value captured in this manner is misleadingly attributed to Northern economic activities

rich countries are able to maintain price inequalities simply by virtue of being rich. This finding supports longstanding claims by political economists that, all else being equal, price inequalities are an artefact of power. Just as in a national economy wage rates are an artefact of the relative bargaining power of labour vis-à-vis capital, so too in international trade prices are an artefact of the relative bargaining power of national economies and corporate actors vis-à-vis their trading partners and suppliers. Countries that grew rich during the colonial period are now able to leverage their economic dominance to depress the costs of labour and resources extracted from the South. In other words, the North “finances” net appropriation from the South not with money, but rather by maintaining the prices of Southern resources and labour below the global average level.

Patents play a key role here: 97% of all patents are held by corporations in high-income countries (Chang, 2008:141)

In some cases, patents involve forcing people in the South to pay for access to resources they might otherwise have obtained much more affordably, or even for free (Shiva, 2001, Shiva, 2016).

In the World Bank and the IMF, Northern states hold a majority of votes (and the US holds a veto), thus giving them control over key economic policy decisions. In the World Trade Organization (which controls tariffs, subsidies, and patents), bargaining power is determined by market size, enabling high-income nations to set trade rules in their own interests.

ubsidized agricultural exports from the North undermine subsistence economies in the South and contribute to dispossession and unemployment, placing downward pressure on wages. Militarized borders preclude easy migration from South to North, thus preventing wage convergence. Moreover, structural adjustment programs (SAPs) imposed by the World Bank and IMF since the 1980s have cut public sector salaries and employment, rolled back labour rights, curtailed unions, and gutted environmental regulations (Khor, 1995, Petras and Veltmeyer, 2002).

SAPs, bilateral free trade agreements, and the World Trade Organization have forced global South governments to remove tariffs, subsidies and other protections for infant industries. This prevents governments from attempting import substitution, which would improve their export prices and drive Northern prices down. Tax evasion and illicit financial flows out of the South (which total more than $1 trillion per year) drain resources that might otherwise be reinvested domestically, or which governments might otherwise use to build national industries. This problem is compounded by external debt service obligations, which drain government revenue and require obeisance to economic policies dictated by creditors (Hickel, 2017). In addition, structural dependence on foreign investors and access to Northern markets forces Southern governments and firms to compete with one another by cutting wages and resource prices in a race to the bottom.

structural power imbalances in the world economy ensure that labour and resources in the South remain cheap and accessible to international capital, while Northern exports enjoy comparatively higher prices

Cheap labour and raw materials in the global South are not “naturally” cheap, as if their cheapness was written in the stars. They are actively cheapened

the analysis obscures class and geographic inequalities within countries and regions, which are significant when it comes to labour prices as well as resource consumption. The high levels of resource consumption that characterize Northern economies are driven disproportionately by rich individuals and affluent areas, as well as by corporations that control supply chains, and enabled by internal patterns of exploitation and unequal exchange in addition to drain through trade (Harvey, 2005). For example, there are marginalized regions of the United States that serve as an “internal periphery” (Wishart, 2014). It would also be useful to explore the gender dynamics of unequal exchange within countries. These questions cannot be answered with our data, however.

This research confirms that the “advanced economies” of the global North rely on a large net appropriation of resources and labour from the global South, extracted through induced price differentials in international trade. By combining insights from the classical literature on unequal exchange with contemporary insights about global commodity chains and new methods for quantifying the physical scale of embodied resource transfers, we are able to develop a novel approach to estimating the scale and value of resource drain from the global South. Our results show that, when measured in Northern prices, the drain amounted to $10.8 trillion in 2015, and $242 trillion over the period from 1990 to 2015 – a significant windfall for the North, equivalent to a quarter of Northern GDP. Meanwhile, the South’s losses through unequal exchange outstrip their total aid receipts over the period by a factor of 30.

support contemporary demands for reparations for ecological debt, as articulated by environmental justice movements and by the G77

True repair requires permanently ending the unequal distribution of environmental goods and burdens between the global North and global South, restoring damaged ecosystems, and shifting to a regenerative economic system.

It is clear that official development assistance is not a meaningful solution to global poverty and inequality; nor is the claim that global South countries need more economic liberalisation and export-oriented market integration. The core problem is that low- and middle-income countries are integrated into the global economy on fundamentally unequal terms. Rectifying this problem is critical to ensuring that global South countries have the financial, physical and human resources they need to improve social outcomes.

democratize the institutions of global economic governance, such as the World Bank, IMF and WTO, so that global South countries have more control over trade and finance policy.

end the North’s use of unfair subsidies for agricultural exports, and remove structural adjustment conditions on international finance, which would help mitigate downward pressure on wages and resource prices in the South while at the same time enabling Southern countries to build sovereign industrial capacity

a global living wage system, and a global system of environmental regulations, would effectively put a floor on labour and resource prices

Reducing North-South price differentials would in turn reduce the scale of the North’s net resource appropriation from the South (in other words, it would reduce ecologically unequal exchange), thus reducing excess consumption in the North and the ecological impacts that it inflicts on the South.

Structural transformation will only be achieved through political struggle from below, including by the anti-colonial and environmental justice movements that continue to fight against imperialism today

Forest loss and species extinctions have only increased as industrial agriculture has scaled up in Brazil. Farmers are burning unprecedented amounts of forest to expand their operations in pursuit of an industrial model. In August 2019, smoke blocked the sun in São Paulo, Brazil, 2,000 miles away from the fires in the state of Amazonas.

As agriculture has industrialized in India, the use of pesticides and fertilizers has risen as well. Although it has become more difficult to breathe the air in Brazil, it has become harder to find clean freshwater in India, where pesticide contamination is rising. There, the costs of the industrial agriculture model are plainly ecological and human: Unable to drink the water or pay back the loans they took out to finance their transition to industrial farming, an alarming number of Indian farmers are drinking pesticides instead. Almost a quarter-million Indian farmers have died by suicide since 2000, and 10,281 farmers and farm laborers killed themselves in 2019 alone.

we are peering into an abyss of systemic socioecological collapse because every effort has been made to use industrialization to break through all known ecological and human limitations to scaling agriculture.

nutrient runoff from industrial agriculture in the U.S. Midwest has created an annual dead zone—a hypoxic area low in or devoid of oxygen—that is the size of Massachusetts

Rural communities are experiencing rising suicide rates, especially among young people, along with increases in “deaths of despair” from alcohol and drugs—an expanding human dead zone

Industrialized agriculture has been a hallmark of U.S. foreign policy in the post-World War II era. Under the guise of development for all and the mantra of “feed the world,” the United States has used policy to dump surplus grain in low-income countries—undermining markets for smallholder farmers—and cultivate foreign markets as importers of high-input, industrial agriculture technologies to scale agriculture. At home, federal policy since the 1970s has explicitly promoted scaling industrial agriculture through the “get big or get out” imperative.

The U.S. Corn Belt, which spans the region from Ohio to Nebraska, produces 75 percent of the country’s corn, but around 35 percent of the region has completely lost its topsoil. Industrial agriculture has been pursued with special zeal in Iowa, where there are 25 million hogs and 3 million people. There, water from the Raccoon River enters the state capital of Des Moines—home to 550,000 people—with nitrates, phosphorus, and bacteria that have exceeded federal safe water drinking standards.

Soil and water-conserving perennial varieties of rice, wheat, legumes, and other food-grain crops—which are now being developed—could serve as components of diverse, perennial, multispecies communities of food crops that replicate how nature functions

smaller, more diverse farm operations

It is time to scale down agriculture and enhance our resilience to coming disruptions

if we want a decent shot at climate stability, high-income nations will have to shift to post-growth economic principles

Post-growth thinking is starting to trickle into policy, too. Jacinda Ardern, the prime minister of New Zealand, captured headlines in 2019

Economists have long assumed that we need growth to improve people’s lives. But it turns out there’s no empirical evidence for this argument. Beyond a certain point, which high-income countries have long since surpassed, the relationship between GDP and human wellbeing completely breaks down.

dozens of countries beat the US in life expectancy with only a fraction of the income

universal public services are significantly more cost-efficient than their private counterparts. Spain spends $2,300 per person on healthcare,

The reason that GDP growth tends not to deliver the outcomes that we might expect is because the vast majority of it goes straight into the pockets of the rich. They are the real beneficiaries of growth. In the United States, the incomes of the richest 1% have more than tripled since the 1970s,

growthism

Climate scientists are warning that it’s not feasible for high-income nations to transition to renewables fast enough to stay within the carbon budget for 1.5C, or even 2C, if they continue to pursue economic growth at the usual rates. Why? Because more growth means more energy demand, and more demand makes it all the more difficult to roll out enough renewable energy capacity. According to a team of scientists based in Canada,

The less energy we use, the easier it is to accomplish a rapid transition to renewables. This is perhaps the single most important lesson that climate science has taught us in the past few years.

Think of all the energy that’s needed to extract and produce and transport all of the material commodities that the economy churns out each year. Think of the mining, the logging, the factories, the packaging, the container ships, the warehouses, the retail outlets and the waste disposal facilities. The material economy is a giant energy-sucking machine. By reducing the material "throughput" of our economy – the amount of stuff we produce and consume – we can reduce our energy demand. 

The key thing to grasp is that a huge chunk of material production in our economy is intended, literally, to be wasted. Firms desperate to overcome the limits of saturated markets resort to all sorts of devious tactics to artificially increase turnover. Take planned obsolescence, for example. The lifespan of household appliances like refrigerators and washing machines has plummeted over the past few decades.

Research by US sociologists has revealed that advertising expenditures have a direct impact

We like to think of capitalism as a system that’s rational and efficient when it comes to meeting human needs. But in some respects, it’s exactly the opposite. In pursuit of constant growth, firms resort to intentional inefficiencies. This might be rational from the perspective of profits, but from the perspective of human need, and from the perspective of ecology, it is a kind of madness. It is madness in terms of human labour, too. Think about the millions of hours that are poured into producing stuff that’s designed to break down, or that people don’t actually need in the first place.

We can legislate for long-term warranties, rights to repair, and mandatory take-back schemes. We can regulate marketing expenditures, and we can liberate public spaces from ads telling us to buy even more – both offline and online. The gains from this could be enormous. Think about it: if clothes and refrigerators and smartphones last twice as long, we will consume half as many. That’s half the extraction, half the shipping, half the warehouses, half the transport, half the waste – and half the energy it takes to power it all. 

There are also a number of other steps we can take. We can shift from private cars to public transport. We can ban food waste by supermarkets and farms. We can cut single-use packaging. And we can choose to scale down ecologically destructive and socially less necessary industries, such as SUVs,

But, you might ask, what about jobs? As we scale down unnecessary industrial activity, won’t that cause unemployment to rise? Under normal circumstances, yes. But ecological economists have a surprisingly simple solution to this: shorten the working week. Add a job guarantee to the mix (a policy that happens to be resoundingly popular)

What’s exciting about this move is that it has a substantial positive impact on wellbeing. Studies in the US have found that people who work shorter hours are happier than those who work longer hours, even when controlling for income. And it has a big impact on energy demand, too. If the United States were to reduce its working hours to the levels of western Europe, its energy use would decline by a staggering 20%. 

Public interest in post-growth economics has soared over the past year as the climate crisis worsens. With fires blazing through Australia and the Amazon, floods swamping northern England, droughts driving migration, and record heatwaves searing across Antarctica, people realise that the status quo has us hurtling toward disaster, and they’re increasingly open to new ideas. In the 2020s, we can expect that the climate movement will rally around the Green New Deal and a vision for a completely new economy. 

The Westphalian political imaginary of separate competing territorial states is a spatial arrangement singularly unsuited to the collective tasks ahead, but it is the institutional context within which we have to act.

AGRA, initiated in 2006, heralded a new campaign to bring the kind of input-intensive agriculture to Africa that had failed to take hold on the continent when the first Green Revolution swept through much of Asia and Latin America in the 1960s and 1970s.

AGRA worked with governments to speed the development of high-yield commercial seeds designed for Africa’s wide range of soils and climates and to facilitate the delivery to farmers of those seeds and the inorganic fertilizers that would make them grow.

Many warned that it was seeking to impose Western technologies inappropriate for the continent’s soils, farmers and food systems. Some decried the lack of consultation with African farmers on the nature of the interventions.9 Others pointed out the serious flaws in the first Green Revolution: water supplies depleted and contaminated with chemical runoff; farmers indebted due to high input costs while yields declined after their initial increases; and the loss of crop and diet diversity as Green Revolution crops took over the countryside

African farm groups like the Alliance for Food Sovereignty in Africa (AFSA) also warned of the loss of food sovereignty, the ability of communities and nations to freely choose how they wanted to feed themselves, as large commercial firms could come to dominate local markets backed by new government policies designed to ensure market access.

Only one country, Ethiopia, shows anything resembling the combination of yield growth and hunger reduction Green Revolution proponents promised, with a 73% increase in productivity and a 29% decrease in the number of hungry. Note, however, that neither of these is on track to meet AGRA’s goal of doubling productivity (100% increase) and halving the number of hungry (which would be a 50% decrease). Ghana is the only other AGRA country that shows decent productivity growth with some decrease in hunger. Malawi achieved relatively strong yield growth but only a small reduction in undernourishment.

These data suggest that Green Revolution programs have not produced a productivity boom through intensification but rather an extensification onto new lands. The promotion of extensification is a serious contradiction for Green Revolution proponents. The explicit goal of “sustainable intensification” is to minimize pressure on land and water resources while limiting further greenhouse gas emissions. To the extent Green Revolution programs are encouraging extensification, they are at odds with national and donor government commitments to mitigate climate change. Depending on individual countries’ land endowments, extensification can be a serious problem. Rwanda, for example, is densely populated and does not have vast tracts of uncultivated arable land.

Evidence would suggest that the main beneficiaries are likely not the poorest or most food-insecure farmers but rather a growing number of medium-scale farmers who have access to more land and are already integrated into commercial networks. Only a fraction of such farmers come up from the ranks of smallholders; many are new investors in farming from urban elites. One study showed that a tiny fraction of smallholders is likely to become commercial farmers.18

Cassava, a key staple in Nigeria, Mozambique, Uganda, Tanzania and many other AGRA countries, saw a 6% decline in yields. Overall, roots and tubers, which include nutritious crops such as sweet potatoes, experienced a 7% decline in yields. Groundnuts, another critical staple source of protein in many countries, saw an alarming 23% drop in yields.

The Staple Crop Index shows that Rwanda’s apparent success in maize has come at the expense of more comprehensive food crop productivity.

The total number of undernourished in AGRA’s 13 countries has increased from 100.5 million to 131.3 million, a 30% increase, from before AGRA to 2018. Only Ethiopia, Ghana and Mali report a significant decline in the absolute number of chronically hungry residents

One of the negative consequences of the Green Revolution focus on maize and other commodity crops is the declining importance of nutritious and climate-resilient crops like millet and sorghum, which have been key components in healthy diets. These are rarely supported by African governments or AGRA; meanwhile, input subsidies and supports for maize and other favored crops provide incentives for farmers to decrease the cultivation of their own crop varieties

AGRA seems to be feeding Africa’s worrisome trend toward locking in path dependency on input-intensive agriculture, much to the detriment of smallholder farmers

Unlike industrial-scale farmers in developed countries, their path has not yet been determined; there remain opportunities to chart paths different from the high-input agriculture model promoted by AGRA.

Agroecology is one of the systems giving farmers the kinds of innovation they need, farming with nature to promote the soil-building practices that Green Revolution practices often undermine. Building on farmers’ knowledge of local conditions and food cultures, multiple food crops are grown in the same field. Compost, manure and biofertilizers — not fossil-fuel-based fertilizer — are used to nourish fields. Biological pest control decreases pesticide use. Researchers work with farmers to improve the productivity of their seeds rather than replacing them with commercial varieties farmers need to buy every year and douse with fertilizer to make them grow.25 AFSA has documented the effectiveness of agroecology, now widely promoted among its member organizations as a key step toward food sovereignty.26 Such initiatives also achieve productivity increases more impressive than those achieved by Green Revolution programs. One University of Essex study surveyed nearly 300 large ecological agriculture projects across more than 50 poor countries and documented an average 79% increase in productivity with decreasing costs and rising incomes.27 Such results far surpass those of the Green Revolution.

It is time for international donors and African governments to change course, to shift their agricultural development funding toward the kinds of low-input sustainable farming that many small-scale farmers in Africa are pioneering under the banner of agroecology. With substantial support, like that provided to Green Revolution programs, agroecology can be Africa’s food future

degrowth has come under severe criticism from pundits, mainstream economists, and the jet-setting Davos elite

austerity is always imposed for the sake of growth. We have been convinced, for half a century now, that cutting public services is good for us because it will increase competitiveness, balance the budget, and eventually lead to growth. Degrowth, by contrast, is the argument that we can, and should, move away from an economy that exclusively depends on economic growth.

While austerity increases inequality by curbing public services and benefitting the rich through tax cuts and privatisation of government services, degrowth policies focus on democratising production, curbing the wealth and overconsumption of the rich, expanding public services, and increasing equality within and between societies.

Recessions make inequality worse, degrowth is about making sure everyone has their needs met. Recessions often cause bold policies for sustainability to be abandoned for the sake of restarting growth, while degrowth is explicitly for a rapid and decisive transformation.

Because profits are based on making labour and nature as cheap as possible, the very basis of profit is always at risk, for example, through labour shortages or supply bottlenecks. Thus, constant economic expansion will also see constant crises.

As argued by Naomi Klein in the book Shock Doctrine, crises are often taken advantage of by the owners of capital because they make it possible to thrash social and ecological legislation, thus lowering the costs of wages and resources, and further generating windfall profits through inflation.

infrastructure projects which will lock in fossil fuel use for decades continue to be built and expanded, while banks, energy companies and multinationals that are involved in polluting and carbon-intensive industries are bailed out with public money and given lucrative government contracts

A recent UN report found that nine out of 10 countries worldwide have fallen behind on life expectancy, education and living standards. For decades, international organisations have promised to fight global inequality and poverty with growth – but the results are anything but promising.

guarantee access to “universal basic services” like housing, food, healthcare, mobility, and childcare to the general population, by taking them out of the market.

Germany’s three-month experiment with a $9 monthly ticket for all regional and city public transport could serve as an example. It not only reduced carbon dioxide emissions by 1.8 million tonnes – equivalent to powering about 350,000 homes for a year – but it also helped mitigate the effects of high inflation rates, increased freedom of mobility for all, and was quite popular with the public.

a 2020 research paper on energy sufficiency found that it is possible to provide a decent life to the entire global population at 40 percent of current energy use, despite population growth until 2050.

reducing the excess energy and resource use of the rich and making designs more efficient within the framework of a truly circular economy have huge potential to reduce demand

many people would likely possess fewer material objects – but most would have access to better services and society would be more sustainable, just, convivial, and fulfilling

We realize that what we do now, well or badly, will be remembered later on. This sense of enacting history matters. For some of us, it partly compensates for the disruption of our lives.

Actually, we’ve already been living in a historic moment. For the past few decades, we’ve been called upon to act, and have been acting in a way that will be scrutinized by our descendants. Now we feel it. The shift has to do with the concentration and intensity of what’s happening. September 11th was a single day, and everyone felt the shock of it, but our daily habits didn’t shift, except at airports; the President even urged us to keep shopping. This crisis is different. It’s a biological threat, and it’s global. Everyone has to change together to deal with it. That’s really history.

There are 7.8 billion people alive on this planet—a stupendous social and technological achievement that’s unnatural and unstable. It’s made possible by science, which has already been saving us. Now, though, when disaster strikes, we grasp the complexity of our civilization—we feel the reality, which is that the whole system is a technical improvisation that science keeps from crashing down

Today, in theory, everyone knows everything. We know that our accidental alteration of the atmosphere is leading us into a mass-extinction event, and that we need to move fast to dodge it. But we don’t act on what we know. We don’t want to change our habits. This knowing-but-not-acting is part of the old structure of feeling.

Do we believe in science? Go outside and you’ll see the proof that we do everywhere you look. We’re learning to trust our science as a society. That’s another part of the new structure of feeling.

it is the first of many calamities that will likely unfold throughout this century. Now, when they come, we’ll be familiar with how they feel.

water shortages. And food shortages, electricity outages, devastating storms, droughts, floods. These are easy calls. They’re baked into the situation we’ve already created, in part by ignoring warnings that scientists have been issuing since the nineteen-sixties

Imagine what a food scare would do. Imagine a heat wave hot enough to kill anyone not in an air-conditioned space, then imagine power failures happening during such a heat wave.

science fiction is the realism of our time

Science-fiction writers don’t know anything more about the future than anyone else. Human history is too unpredictable; from this moment, we could descend into a mass-extinction event or rise into an age of general prosperity. Still, if you read science fiction, you may be a little less surprised by whatever does happen. Often, science fiction traces the ramifications of a single postulated change; readers co-create, judging the writers’ plausibility and ingenuity, interrogating their theories of history. Doing this repeatedly is a kind of training. It can help you feel more oriented in the history we’re making now. This radical spread of possibilities, good to bad, which creates such a profound disorientation; this tentative awareness of the emerging next stage—these are also new feelings in our time.

remember that you must die. Older people are sometimes better at keeping this in mind than younger people. Still, we’re all prone to forgetting death. It never seems quite real until the end, and even then it’s hard to believe. The reality of death is another thing we know about but don’t feel.

This mixture of dread and apprehension and normality is the sensation of plague on the loose. It could be part of our new structure of feeling, too.

there are charismatic mega-ideas. “Flatten the curve” could be one of them. Immediately, we get it. There’s an infectious, deadly plague that spreads easily, and, although we can’t avoid it entirely, we can try to avoid a big spike in infections, so that hospitals won’t be overwhelmed and fewer people will die. It makes sense, and it’s something all of us can help to do. When we do it—if we do it—it will be a civilizational achievement: a new thing that our scientific, educated, high-tech species is capable of doing. Knowing that we can act in concert when necessary is another thing that will change us.

People who study climate change talk about “the tragedy of the horizon.” The tragedy is that we don’t care enough about those future people, our descendants, who will have to fix, or just survive on, the planet we’re now wrecking. We like to think that they’ll be richer and smarter than we are and so able to handle their own problems in their own time. But we’re creating problems that they’ll be unable to solve. You can’t fix extinctions, or ocean acidification, or melted permafrost, no matter how rich or smart you are. The fact that these problems will occur in the future lets us take a magical view of them. We go on exacerbating them, thinking—not that we think this, but the notion seems to underlie our thinking—that we will be dead before it gets too serious. The tragedy of the horizon is often something we encounter, without knowing it, when we buy and sell. The market is wrong; the prices are too low. Our way of life has environmental costs that aren’t included in what we pay, and those costs will be borne by our descendents. We are operating a multigenerational Ponzi scheme.

We’ve decided to sacrifice over these months so that, in the future, people won’t suffer as much as they would otherwise. In this case, the time horizon is so short that we are the future people.

Amid the tragedy and death, this is one source of pleasure. Even though our economic system ignores reality, we can act when we have to. At the very least, we are all freaking out together. To my mind, this new sense of solidarity is one of the few reassuring things to have happened in this century. If we can find it in this crisis, to save ourselves, then maybe we can find it in the big crisis, to save our children and theirs.

Thatcher said that “there is no such thing as society,” and Ronald Reagan said that “government is not the solution to our problem; government is the problem.” These stupid slogans marked the turn away from the postwar period of reconstruction and underpin much of the bullshit of the past forty years

We are individuals first, yes, just as bees are, but we exist in a larger social body. Society is not only real; it’s fundamental. We can’t live without it. And now we’re beginning to understand that this “we” includes many other creatures and societies in our biosphere and even in ourselves. Even as an individual, you are a biome, an ecosystem, much like a forest or a swamp or a coral reef. Your skin holds inside it all kinds of unlikely coöperations, and to survive you depend on any number of interspecies operations going on within you all at once. We are societies made of societies; there are nothing but societies. This is shocking news—it demands a whole new world view.

It’s as if the reality of citizenship has smacked us in the face.

The neoliberal structure of feeling totters. What might a post-capitalist response to this crisis include? Maybe rent and debt relief; unemployment aid for all those laid off; government hiring for contact tracing and the manufacture of necessary health equipment; the world’s militaries used to support health care; the rapid construction of hospitals.

If the project of civilization—including science, economics, politics, and all the rest of it—were to bring all eight billion of us into a long-term balance with Earth’s biosphere, we could do it. By contrast, when the project of civilization is to create profit—which, by definition, goes to only a few—much of what we do is actively harmful to the long-term prospects of our species.

Economics is a system for optimizing resources, and, if it were trying to calculate ways to optimize a sustainable civilization in balance with the biosphere, it could be a helpful tool. When it’s used to optimize profit, however, it encourages us to live within a system of destructive falsehoods. We need a new political economy by which to make our calculations. Now, acutely, we feel that need.

We’ll remember this even if we pretend not to. History is happening now, and it will have happened. So what will we do with that?

How we feel is shaped by what we value, and vice versa. Food, water, shelter, clothing, education, health care: maybe now we value these things more, along with the people whose work creates them. To survive the next century, we need to start valuing the planet more, too, since it’s our only home.

As rich countries have been allowed to maintain their level of agricultural subsidies – which are mostly handed out to large producers, not family farms – developing countries have not been allowed under WTO rules to subsidise food production for domestic consumption to guarantee food security, nor to protect their farmers from unfair dumping.

subsidies for the environmentally damaging production of oil and gas remain undisciplined, while countries have successfully sued each other in the WTO for directing subsidies towards greener fuels, especially if they try to create jobs at the same time.

The environment has suffered as countries use environmental exploitation as a comparative advantage, and trade is responsible for a growing percentage of the greenhouse gases that contribute to climate change.

supporters of the WTO were able to get developing countries to agree to a new round of trade talks only by claiming it would be a “development” round – ie, one that put the needs of developing countries at its heart.  Since then, unfortunately, developed countries have never delivered on their promises to address the constraints that bad WTO rules put on development

most developing countries that have gained from trade have done so by exporting to China, whose growth is usually attributed to its divergences from the WTO model. 

At a time when most conversations regarding Big Tech are around the need for stronger antitrust and tax enforcement, and how their model of surveillance capitalism should not be allowed to shape the contours of our media, democracy, human rights, education and social relationships – or even how to break them up – they are working through the WTO, without public debate, to gain a new constitution that will consolidate their power and profits.

the problem with the dispute system is that it adjudicates according to a set of rules guided by corporate interests

The crisis is that people around the world have suffered through nearly 25 years of a damaging pro-corporate trade model, encapsulated by the WTO, and the domestic policies of austerity that have led to uprisings on four continents, mass migrations, and the election of right-wing governments in many countries.

We all need a global economy that facilitates decent jobs, access to affordable medicines, healthy food, and a thriving environment. Nearly all governments agreed to this mandate through the Sustainable Development Goals (SDGs) and Agenda 2030 in 2015. The rules of the global economy should be shaped around ensuring that trade can help achieve these goals, but at the minimum, it should not constrain governments from doing so.

The solution to the current conflicts on trade policy is not a false nationalism that nonetheless expands corporate control, nor a defence of the current failed corporate system. We need a wholly different system than that embodied in the WTO, just as the protesters clamoured for in Seattle 20 years ago. That will require a multilateral vision of ecological stability, shared prosperity, and leadership committed to that vision. Until then, we can expect more crises. 

the planet could see a greater temperature increase in the next 50 years than it did in the last 6,000 years combined. By 2070, the kind of extremely hot zones, like in the Sahara, that now cover less than 1% of the earth’s land surface could cover nearly a fifth of the land, potentially placing 1 of every 3 people alive outside the climate niche where humans have thrived for thousands of years. Many will dig in, suffering through heat, hunger and political chaos, but others will be forced to move on

In Southeast Asia, where increasingly unpredictable monsoon rainfall and drought have made farming more difficult, the World Bank points to more than 8 million people who have moved toward the Middle East, Europe and North America. In the African Sahel, millions of rural people have been streaming toward the coasts and the cities amid drought and widespread crop failures. Should the flight away from hot climates reach the scale that current research suggests is likely, it will amount to a vast remapping of the world’s populations.

Climate is rarely the main cause of migration, the studies have generally found, but it is almost always an exacerbating one.

Northern nations can relieve pressures on the fastest-warming countries by allowing more migrants to move north across their borders, or they can seal themselves off, trapping hundreds of millions of people in places that are increasingly unlivable. The best outcome requires not only goodwill and the careful management of turbulent political forces; without preparation and planning, the sweeping scale of change could prove wildly destabilizing. The United Nations and others warn that in the worst case, the governments of the nations most affected by climate change could topple as whole regions devolve into war

To better understand the forces and scale of climate migration over a broader area, The New York Times Magazine and ProPublica joined with the Pulitzer Center in an effort to model, for the first time, how people will move across borders

Our model projects that migration will rise every year regardless of climate, but that the amount of migration increases substantially as the climate changes. In the most extreme climate scenarios, more than 30 million migrants would head toward the U.S. border over the course of the next 30 years

If governments take modest action to reduce climate emissions, about 680,000 climate migrants might move from Central America and Mexico to the United States between now and 2050. If emissions continue unabated, leading to more extreme warming, that number jumps to more than a million people. (None of these figures include undocumented immigrants, whose numbers could be twice as high.)

As with much modeling work, the point here is not to provide concrete numerical predictions so much as it is to provide glimpses into possible futures. Human movement is notoriously hard to model, and as many climate researchers have noted, it is important not to add a false precision to the political battles that inevitably surround any discussion of migration. But our model offers something far more potentially valuable to policymakers: a detailed look at the staggering human suffering that will be inflicted if countries shut their doors.

the coronavirus pandemic has offered a test run on whether humanity has the capacity to avert a predictable — and predicted — catastrophe. Some countries have fared better. But the United States has failed. The climate crisis will test the developed world again, on a larger scale, with higher stakes

Drought helped push many Syrians into cities before the war, worsening tensions and leading to rising discontent; crop losses led to unemployment that stoked Arab Spring uprisings in Egypt and Libya; Brexit, even, was arguably a ripple effect of the influx of migrants brought to Europe by the wars that followed. And all those effects were bound up with the movement of just 2 million people. As the mechanisms of climate migration have come into sharper focus — food scarcity, water scarcity and heat — the latent potential for large-scale movement comes to seem astronomically larger.

In the case of Addis Ababa, the World Bank suggests that in the second half of the century, many of the people who fled there will be forced to move again, leaving that city as local agriculture around it dries up.

North Africa’s Sahel provides an example. In the nine countries stretching across the continent from Mauritania to Sudan, extraordinary population growth and steep environmental decline are on a collision course. Past droughts, most likely caused by climate change, have already killed more than 100,000 people there. And the region — with more than 150 million people and growing — is threatened by rapid desertification, even more severe water shortages and deforestation. Today researchers at the United Nations estimate that some 65% of farmable lands have already been degraded. “My deep fear,” said Solomon Hsiang, a climate researcher and economist at the University of California, Berkeley, is that Africa’s transition into a post-climate-change civilization “leads to a constant outpouring of people.”

The story is similar in South Asia, where nearly one-fourth of the global population lives. The World Bank projects that the region will soon have the highest prevalence of food insecurity in the world. While some 8.5 million people have fled already — resettling mostly in the Persian Gulf — 17 million to 36 million more people may soon be uprooted, the World Bank found. If past patterns are a measure, many will settle in India’s Ganges Valley; by the end of the century, heat waves and humidity will become so extreme there that people without air conditioning will simply die.

We are now learning that climate scientists have been underestimating the future displacement from rising tides by a factor of three, with the likely toll being some 150 million globally. New projections show high tides subsuming much of Vietnam by 2050 — including most of the Mekong Delta, now home to 18 million people — as well as parts of China and Thailand, most of southern Iraq and nearly all of the Nile Delta, Egypt’s breadbasket. Many coastal regions of the United States are also at risk.

rough predictions have emerged about the scale of total global climate migration — they range from 50 million to 300 million people displaced — but the global data is limited, and uncertainty remained about how to apply patterns of behavior to specific people in specific places.

Once the model was built and layered with both approaches — econometric and gravity — we looked at how people moved as global carbon concentrations increased in five different scenarios, which imagine various combinations of growth, trade and border control, among other factors. (These scenarios have become standard among climate scientists and economists in modeling different pathways of global socioeconomic development.)

every one of the scenarios it produces points to a future in which climate change, currently a subtle disrupting influence, becomes a source of major disruption, increasingly driving the displacement of vast populations.

Around 2012, a coffee blight worsened by climate change virtually wiped out El Salvador’s crop, slashing harvests by 70%. Then drought and unpredictable storms led to what a U.N.-affiliated food-security organization describes as “a progressive deterioration” of Salvadorans’ livelihoods.

climate change can act as what Defense Department officials sometimes refer to as a “threat multiplier.”

For all the ways in which human migration is hard to predict, one trend is clear: Around the world, as people run short of food and abandon farms, they gravitate toward cities, which quickly grow overcrowded. It’s in these cities, where waves of new people stretch infrastructure, resources and services to their limits, that migration researchers warn that the most severe strains on society will unfold

the World Bank has raised concerns about the mind-boggling influx of people into East African cities like Addis Ababa, in Ethiopia, where the population has doubled since 2000 and is expected to nearly double again by 2035

now a little more than half of the planet’s population lives in urban areas, but by the middle of the century, the World Bank estimates, 67% will. In just a decade, 4 out of every 10 urban residents — 2 billion people around the world — will live in slums

Migration can bring great opportunity not just to migrants but also to the places they go

High emissions, with few global policy changes and relatively open borders, will drive rural El Salvador — just like rural Guatemala — to empty out, even as its cities grow. Should the United States and other wealthy countries change the trajectory of global policy, though — by, say, investing in climate mitigation efforts at home but also hardening their borders — they would trigger a complex cascade of repercussions farther south, according to the model. Central American and Mexican cities continue to grow, albeit less quickly, but their overall wealth and development slows drastically, most likely concentrating poverty further. Far more people also remain in the countryside for lack of opportunity, becoming trapped and more desperate than ever.

By midcentury, the U.N. estimates that El Salvador — which has 6.4 million people and is the most densely populated country in Central America — will be 86% urban

Most would-be migrants don’t want to move away from home. Instead, they’ll make incremental adjustments to minimize change, first moving to a larger town or a city. It’s only when those places fail them that they tend to cross borders, taking on ever riskier journeys, in what researchers call “stepwise migration.” Leaving a village for the city is hard enough, but crossing into a foreign land — vulnerable to both its politics and its own social turmoil — is an entirely different trial.

I arrived in Tapachula five weeks after the breakout to find a city cracking in the crucible of migration. Just months earlier, passing migrants on Mexico’s southern border were offered rides and tortas and medicine from a sympathetic Mexican public. Now migrant families were being hunted down in the countryside by armed national-guard units, as if they were enemy soldiers.

Models can’t say much about the cultural strain that might result from a climate influx; there is no data on anger or prejudice. What they do say is that over the next two decades, if climate emissions continue as they are, the population in southern Mexico will grow sharply. At the same time, Mexico has its own serious climate concerns and will most likely see its own climate exodus. One in 6 Mexicans now rely on farming for their livelihood, and close to half the population lives in poverty. Studies estimate that with climate change, water availability per capita could decrease by as much as 88% in places, and crop yields in coastal regions may drop by a third. If that change does indeed push out a wave of Mexican migrants, many of them will most likely come from Chiapas.

even as 1 million or so climate migrants make it to the U.S. border, many more Central Americans will become trapped in protracted transit, unable to move forward or backward in their journey, remaining in southern Mexico and making its current stresses far worse.

Already, by late last year, the Mexican government’s ill-planned policies had begun to unravel into something more insidious: rising resentment and hate. Now that the coronavirus pandemic has effectively sealed borders, those sentiments risk bubbling over. Migrants, with nowhere to go and no shelters able to take them in, roam the streets, unable to socially distance and lacking even basic sanitation. It has angered many Mexican citizens, who have begun to describe the migrants as economic parasites and question foreign aid aimed at helping people cope with the drought in places where Jorge A. and Cortez come from.

a new Mexico-first movement, organizing thousands to march against immigrants

Trump had, as another senior government official told me, “held a gun to Mexico’s head,” demanding a crackdown at the Guatemalan border under threat of a 25% tariff on trade. Such a tax could break the back of Mexico’s economy overnight, and so López Obrador’s government immediately agreed to dispatch a new militarized force to the border.

laying blame at the feet of neoliberal economics, which he said had produced a “poverty factory” with no regional development policies to address it. It was the system — capitalism itself — that had abandoned human beings, not Mexico’s leaders. “We didn’t anticipate that the globalization of the economy, the globalization of the law … would have such a devastating effect,”

No policy, though, would be able to stop the forces — climate, increasingly, among them — that are pushing migrants from the south to breach Mexico’s borders, legally or illegally. So what happens when still more people — many millions more — float across the Suchiate River and land in Chiapas? Our model suggests that this is what is coming — that between now and 2050, nearly 9 million migrants will head for Mexico’s southern border, more than 300,000 of them because of climate change alone.

“If we are going to die anyway,” he said, “we might as well die trying to get to the United States.”

El Paso is also a place with oppressive heat and very little water, another front line in the climate crisis. Temperatures already top 90 degrees here for three months of the year, and by the end of the century it will be that hot one of every two days. The heat, according to researchers at the University of California, Berkeley, will drive deaths that soon outpace those from car crashes or opioid overdoses. Cooling costs — already a third of some residents’ budgets — will get pricier, and warming will drive down economic output by 8%, perhaps making El Paso just as unlivable as the places farther south.

Without a decent plan for housing, feeding and employing a growing number of climate refugees, cities on the receiving end of migration can never confidently pilot their own economic future.

The United States refused to join 164 other countries in signing a global migration treaty in 2018, the first such agreement to recognize climate as a cause of future displacement. At the same time, the U.S. is cutting off foreign aid — money for everything from water infrastructure to greenhouse agriculture — that has been proved to help starving families like Jorge A.’s in Guatemala produce food, and ultimately stay in their homes. Even those migrants who legally make their way into El Paso have been turned back, relegated to cramped and dangerous shelters in Juárez to wait for the hearings they are owed under law.

There is no more natural and fundamental adaptation to a changing climate than to migrate. It is the obvious progression the earliest Homo sapiens pursued out of Africa, and the same one the Mayans tried 1,200 years ago. As Lorenzo Guadagno at the U.N.’s International Organization for Migration told me recently, “Mobility is resilience.” Every policy choice that allows people the flexibility to decide for themselves where they live helps make them safer.

what may be the worst-case scenario: one in which America and the rest of the developed world refuse to welcome migrants but also fail to help them at home. As our model demonstrated, closing borders while stinting on development creates a somewhat counterintuitive population surge even as temperatures rise, trapping more and more people in places that are increasingly unsuited to human life

the global trend toward building walls could have a profound and lethal effect. Researchers suggest that the annual death toll, globally, from heat alone will eventually rise by 1.5 million. But in this scenario, untold more will also die from starvation, or in the conflicts that arise over tensions that food and water insecurity will bring

America’s demographic decline suggests that more immigrants would play a productive role here, but the nation would have to be willing to invest in preparing for that influx of people so that the population growth alone doesn’t overwhelm the places they move to, deepening divisions and exacerbating inequalities.

At the same time, the United States and other wealthy countries can help vulnerable people where they live, by funding development that modernizes agriculture and water infrastructure. A U.N. World Food Program effort to help farmers build irrigated greenhouses in El Salvador, for instance, has drastically reduced crop losses and improved farmers’ incomes. It can’t reverse climate change, but it can buy time.

Thus far, the United States has done very little at all. Even as the scientific consensus around climate change and climate migration builds, in some circles the topic has become taboo. This spring, after Proceedings of the National Academy of Sciences published the explosive study estimating that, barring migration, one-third of the planet’s population may eventually live outside the traditional ecological niche for civilization, Marten Scheffer, one of the study’s authors, told me that he was asked to tone down some of his conclusions through the peer-review process and that he felt pushed to “understate” the implications in order to get the research published. The result: Migration is only superficially explored in the paper.

Our modeling and the consensus of academics point to the same bottom line: If societies respond aggressively to climate change and migration and increase their resilience to it, food production will be shored up, poverty reduced and international migration slowed — factors that could help the world remain more stable and more peaceful. If leaders take fewer actions against climate change, or more punitive ones against migrants, food insecurity will deepen, as will poverty. Populations will surge, and cross-border movement will be restricted, leading to greater suffering. Whatever actions governments take next — and when they do it — makes a difference.

The world can now expect that with every degree of temperature increase, roughly a billion people will be pushed outside the zone in which humans have lived for thousands of years

“If we don’t develop a different attitude,” he said, “we’re going to be like people in the lifeboat, beating on those that are trying to climb in.”

“For a long time, people have known that chemical pollution is a bad thing. But they haven’t been thinking about it at the global level. This work brings chemical pollution, especially plastics, into the story of how people are changing the planet.”

a huge number of chemical compounds registered for use – about 350,000 – and only a tiny fraction of these have been assessed for safety.

the total mass of plastics now exceeds the total mass of all living mammals

“Shifting to a circular economy is really important. That means changing materials and products so they can be reused, not wasted.”

There are growing calls for international action on chemicals and plastics, including the establishment of a global scientific body for chemical pollution akin to the Intergovernmental Panel on Climate Change.

“The rise of the chemical burden in the environment is diffuse and insidious. Even if the toxic effects of individual chemicals can be hard to detect, this does not mean that the aggregate effect is likely to be insignificant.“Regulation is not designed to detect or understand these effects. We are relatively blind to what is going on as a result. In this situation, where we have a low level of scientific certainty about effects, there is a need for a much more precautionary approach to new chemicals and to the amount being emitted to the environment.”

The chemical pollution planetary boundary is the fifth of nine that scientists say have been crossed, with the others being global heating, the destruction of wild habitats, loss of biodiversity and excessive nitrogen and phosphorus pollution.

data from Global Forest Watch shows that Brazil, DRC and Indonesia were among the top five countries for primary forest loss in 2021, with 11.1m hectares of tree cover lost in the tropics overall last year.