Even after 150 years, Darwin’s theory of evolution by natural selection is irresistibly compelling. But how can this idea—in which competition prevails—be consistent with all that we know about the thoroughly cooperative nature of life at the genetic and cellular level? This book reconciles these discrepancies.

Assembling a set of general principles, authors Kenneth Weiss and Anne Buchanan build a comprehensive, unified theory that applies on the evolutionary time scale but also on the developmental and ecological scales where daily life is lived, and cells, organisms, and species interact. They present this story through a diversity of examples spanning the fundamental challenges that organisms have faced throughout the history of life. This shows that even very complex traits can be constructed simply, based on these principles. Although relentless competitive natural selection is widely assumed to be the primary mover of evolutionary change, The Mermaid’s Tale shows how life more generally works on the basis of cooperation. The book reveals that the focus on competition and cooperation is largely an artifact of the compression of time—a distortion that dissolves when the nature and origins of adapted life are viewed primarily from developmental and evolutionary time scales.

The origins of Islam have been the subject of increasing controversy in recent years. The traditional view, which presents Islam as a self-consciously distinct religion tied to the life and revelations of the prophet Muhammad in western Arabia, has since the 1970s been challenged by historians engaged in critical study of the Muslim sources.

In Muhammad and the Believers, the eminent historian Fred Donner offers a lucid and original vision of how Islam first evolved. He argues that the origins of Islam lie in what we may call the "Believers' movement" begun by the prophet Muhammad—a movement of religious reform emphasizing strict monotheism and righteous behavior in conformity with God's revealed law. The Believers' movement thus included righteous Christians and Jews in its early years, because like the Qur'anic Believers, Christians and Jews were monotheists and agreed to live righteously in obedience to their revealed law. The conviction that Muslims constituted a separate religious community, utterly distinct from Christians and Jews, emerged a century later, when the leaders of the Believers' movement decided that only those who saw the Qur'an as the final revelation of the One God and Muhammad as the final prophet, qualified as Believers. This separated them decisively from monotheists who adhered to the Gospels or Torah.