Evolutionary psychology is an important and rapidly expanding area in the life, social, and behavioral sciences, and this Handbook represents the most comprehensive and up-to-date reference text in the field today. Chapters in this Handbook address foundational theories and methodological approaches, providing a rich overview of the most important theoretical and empirical work in the field. The SAGE Handbook of Evolutionary Psychology is an essential resource for researchers, graduate students, and advanced undergraduate students in all areas of psychology, and in related disciplines across the life, social, and behavioral sciences.   Part 1: Foundations of Evolution Part 2: Middle-Level Evolutionary Theories Part 3: Research Methods and Strategies