This book sheds new light on the problem of how the human mind evolved. Harry Smit argues that current studies of this problem misguidedly try to solve it by using variants of the Cartesian conception of the mind, and shows that combining the Aristotelian conception with Darwin's theory provides us with far more interesting answers. He discusses the core problem of how we can understand language evolution in terms of inclusive fitness theory, and investigates how scientific and conceptual insights can be integrated into one explanatory framework, which he contrasts with the alternative Cartesian-derived framework. He then explores the differences between these explanatory frameworks with reference to co-operation and conflict at different levels of biological organization, the evolution of communicative behaviour, the human mind, language, and moral behaviour. His book will interest advanced students and scholars in a range of subjects including philosophy, biology and psychology.