This article evaluates theories of the origins of sex differences in human behavior. It reviews
the cross-cultural evidence on the behavior of women and men in nonindustrial societies …

Despite a long history of study, consensus on a human-typical mating system remains
elusive. While a simple classification would be useful for cross-species comparisons, across …

What is morality, where does it come from, and how does it work? Scholars have struggled
with these questions for millennia. But we now have a scientific answer. The theory of …

Somewhere in Africa, more than a million years ago, a line of apes began to rear their young
differently than their Great Ape ancestors. From this new form of care came new ways of …

Contemporary mate preferences can provide important clues to human reproductive history.
Little is known about which characteristics people value in potential mates. Five predictions …

With the discovery of conditioned reflexes by IP Pavlov, the possibilities for experimenting,
following the example set by the classical, exact sciences, were made available to the …

Sexual jealousy functions to defend paternity confidence and is therefore expected to be a
ubiquitous aspect of male psychology. Several lines of evidence confirm this expectation …

Evolutionary theory is one of the most wide-ranging and inspiring of scientific ideas. It offers
a battery of methods that can be used to interpret human behaviour. But the legitimacy of this …

The American family is changing. Divorce, single parents, and stepfamilies are redefining
the ways we live together and raise our children. Many" experts" feel these seemingly …

Research conducted in the last fifteen years has placed in question many of the traditional
conclusions scholars have formed about human female sexuality. Though conventional …