Combining a broad view of its subject with stimulating ideas and speculation, this edition is a thorough revision which aims to present an up-to-date and critical review of the most important areas of behavioural ecology. Each chapter presents a balanced view of the field, integrating a clear exposition of the theory and a critical discussion of how predictions have been tested by experiments and comparative studies. In addition, the book points to unresolved issues and possible future developments. It draws on a team of international experts to provide a synthesis of the subject as it is presently understood. The book is divided into four sections: natural selection and life histories; exploitation of resources; sexual selection and mating systems; and co-operation, conflict and kinship.