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Any theory of being American must explain one salient and striking fact: cruelty. America is the most cruel nation among its peers — even among most poor countries today. It is something like a new Rome. It has little, if any, functioning healthcare, education, transport, media, no safety nets, no stability, security. The middle class is collapsing, and life expectancy is falling. Young people die for a lack of insulin they cannot crowdfund. Elderly middle-class people live and die in their cars. Kids massacre each other in schools — when they’re not self-medicating the pain of it all away. The combination of these pathologies happens nowhere else — not a single place — in the world. Not even Pakistan, Costa Rica, or Rwanda. Hence, the world is aghast daily at the depths of American cruelty — yet somehow, they seem bottomless.(Of course I don’t mean that all Americans are cruel. I just mean that in the same way we say countries have attitude, dispositions, that there’s such a thing as a French or German national attitude or disposition, so, too there is an American one. Nor do I mean America is “the most cruel society in the world”. Can we really ever judge that? But it is uniquely cruel — a kind of special example — in weird, needless, and singular ways.)Let me throw that into relief. Scandinavians are the happiest, longest-lived, and most prosperous people in the world because they do not punish one another constantly — but lift one another up. But Americans do not believe this reality. The underlying sentiment that unites America’s manifold problems is a myth of cruelty.

Megatrends such as digitization, the rise of automation, and shifting demographics are disrupting the way we work, and the way companies relate to workers.

We at PwC have spent some time envisioning four alternative future worlds of work, each named with a color. These admittedly extreme examples of how work could look in 2030 are shaped by the ways people and organizations respond to the forces of collectivism and individualism, on one axis, and integration and fragmentation on the other. These scenarios can help organizations think through possibilities and how they will prepare to meet them. One prospect is that the world could move away from big company capitalism as technology enables small businesses and niche marketers to become more powerful. Or collectivism could take priority, as societies and companies work together through a sense of shared responsibility. Will “me first” prevail, or will societies come together for the greater good? Will digital technology mark the end for large companies, or will it enable large companies to slash their internal and external costs and become more powerful?

But new research finds one factor that influences the rate at which our brains age is largely outside our control: our socioeconomic status.

"Engaging and resourceful environments associated with higher socioeconomic status may provide a buffer or delay against aging," the researchers write. "Inadequate health conditions associated with lower socioeconomic status environments (such as exposure to toxins and poorer nutrition), together with continual stress, may accelerate the aging process."

Using neuroimaging, the researchers evaluated participants' brains in two ways, measuring "functional network organization and cortical gray matter thickness." They found both measures demonstrated greater aging in people of lower socioeconomic status, even after accounting for demographic differences and personal health.