The initial processes that eventually led to the emergence of class societies (although the word “class” does not appear anywhere in the PNAS article) began to appear during the last stages of ...

Nancy Birdsall, founding president of the Center for Global Development, talked about the importance of building middle-class societies at a lecture entitled "Development in this Century: Building ...

People in middle-class societies feel they share a similar fate and thus are more willing to make investments that they may not directly benefit from. To see how this works, take the case of ...

Elites lived together with those of lower social classes and women who migrated in from outside communities. It appears early human societies operated in a complex, class-based system that ...

Genetic and archaeological data indicate that social stratification in Europe during the third and second millennium BC was more complex than previously thought, and may indicate the origins of ...