Evolutionary psychology is a modern theoretical approach to the study of psychology from the perspective of evolution. It works on the belief that human behavior is a result of psychological adaptation generated to solve recurring problems in ancestral surroundings. The field strives to identify the human traits that have evolved through natural selection or sexual selection. The theories and principles developed in evolutionary psychology are of importance in the fields of psychiatry, economics, literature, environment, politics, etc. Several strategies are developed to test whether a psychological trait is an evolved adaptation, a random variation or a byproduct. These include cross-cultural consistency, form to function, function to form, current evolutionary adaptiveness and corresponding neurological modules. This book explores all the important aspects of evolutionary psychology in the present day scenario. It outlines the processes and applications of this field. This book will serve as a resource guide for students and experts alike.