This document provides an introduction to psychology by summarizing its history and key areas of study. It discusses how psychology has progressed through different waves of thought from introspection to modern eclectic approaches. The modern perspective incorporates seven schools of thought: biopsychology, evolutionary, psychoanalytic, behavioral, humanist, cognitive, and social-cultural. It also outlines three ongoing debates in psychology around the influences of nature vs nurture, stability vs change, and continuity vs discontinuity.