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[Areas of inquiry once reserved for historians and social scientists are now studied by neuroscientists, and among the most fascinating is cultural conflict. Science alone won't provide the answers, but it can offer new insights into how social behavior reflects -- and perhaps even shapes -- basic human biology. An upcoming issue of the Philosophical Transactions of the Royal Society B features a collection of new studies on the biology of conflict. On the following pages, Wired looks at the findings. ...]

"Social butterflies who shine at parties may get their edge from special genes that make them experts at recognizing faces. Scientists have found the strongest evidence to date that genes govern how well we keep track of who's who. The findings suggest that face-recognition and other cognitive skills may be separate from each other, and independent of general intelligence. This could help explain what makes one person good at math but bad at music, or good at spatial navigation but bad at language "People have wondered for a long time what makes one person cognitively different from another person," said cognitive psychologist Nancy Kanwisher of MIT, coauthor of the study published Jan. 7 in Current Biology. "Our study is one tiny piece of the answer to this question." The ability to recognize faces is not just handy for cocktail parties, it's crucial for distinguishing friend from foe and facilitating social interactions. If face recognition increases our ability to fend off predators and find mates, there is an evolutionary drive to encode this ability in our genes. To test this, Kanwisher's team looked at whether the ability to recognize faces runs in the family. They found that identical twins, who share 100 percent of their genes, were more similar in their face-recognition ability than fraternal twins, who share only 50 percent of their genes. This suggests the ability to recognize faces is heritable."

"Why has cooperation, not competition, always been the key to the evolution of complexity? MARTIN NOWAK is a Mathematical Biologist, Game Theorist; Professor of Biology and Mathematics, Director, Center for Evolutionary Dynamics, Harvard University; Author, SuperCooperators: Altruism, Evolution, and Why We Need Each Other to Succeed."

"Sam Arbesman's newest book, Overcomplicated, looks at how many technological systems have grown so complex that they defy easy understanding. In the following lightly edited excerpt, he argues that we need to learn to think more like biologists in order to work with the technology we've created."

Human evolution presents a puzzle. Nothing seems to explain the sudden takeoff of the last 45,000 years-the conversion of just another rare predatory ape into a planet dominator with rapidly progressing technologies. Once "progress" started to produce new tools, different ways of life and burgeoning populations, it accelerated all over the world, culminating in agriculture, cities, literacy and all the rest. Yet all the ingredients of human success-tool making, big brains, culture, fire, even language-seem to have been in place half a million years before and nothing happened. Tools were made to the same monotonous design for hundreds of thousands of years and the ecological impact of people was minimal. Then suddenly-bang!-culture exploded, starting in Africa. Why then, why there?