"This book demonstrates that people's basic values and beliefs are changing, in ways that affect their political, sexual, economic, and religious behavior. These changes are roughly predictable: to a large extent, they can be explained by the revised version of modernization theory presented here. Drawing on a massive body of evidence from societies containing 85 percent of the world's population, the authors demonstrate that modernization is a process...

Cultural evolution' argues that people's values and behavior are shaped by the degree to which survival is secure. It was precarious for most of history, which encouraged heavy emphasis on group solidarity, rejection of outsiders, and obedience to strong leaders. For under extreme scarcity, xenophobia is realistic: if there is just enough land to support one tribe and another tribe tries to claim it, survival may literally be a choice between us and...