Extends and evaluates the Machiavellian Intelligence Hypothesis for intelligence's social basis.Monkeys and apes use their intelligence to manipulate and outmanoeuvre others socially. The 'Machiavellian Intelligence Hypothesis' implies that it was for these social purposes that intelligence first developed, and was brought to fruition in humans. In 1988, Machiavellian Intelligence provided the groundwork for these ideas: in Machiavellian Intelligence II, they are evaluated empirically, and extended in many new directions. The book will be essential reading for all those interested in the behavioural sciences, primatology and evolution.Monkeys and apes use their intelligence to manipulate and outmanoeuvre others socially. The 'Machiavellian Intelligence Hypothesis' implies that it was for these social purposes that intelligence first developed, and was brought to fruition in humans. In 1988, Machiavellian Intelligence provided the groundwork for these ideas: in Machiavellian Intelligence II, they are evaluated empirically, and extended in many new directions. The book will be essential reading for all those interested in the behavioural sciences, primatology and evolution.This book aims to explain the intelligence of monkeys and apes, and the huge brain expansion that marked human evolution. In 1988, Machiavellian Intelligence was the first book to assemble the early evidence suggesting a new answer: that the evolution of intellect was primarily driven by selection for manipulative, social expertise within groups where the most challenging problem faced by individuals was dealing with their companions. Since then a wealth of new information and ideas has accumulated. This new book will bring readers up to date with the most important developments, extending the scope of the original ideas and evaluating them empirically from different perspectives. It is essential reading for reseachers and students in many different branches of evolution and behavioral sciences, prilók