This document provides an overview of the history and schools of thought in psychology. It outlines the major periods in the history of psychology from prehistoric to modern times. Some key figures and ideas are mentioned for each period, including ancient Greek thinkers, medieval Christian and Muslim scholars, and important modern pioneers. The document also defines what a school of thought is in psychology and lists major perspectives that have synthesized the discipline such as structuralism, functionalism, behaviorism, and others.