Book excerpt: Integrating significant advances in motivation science that have occurred over the last two decades, this volume thoroughly examines the ways in which motivation interacts with social, developmental, and emotional processes, as well as personality more generally. The Handbook comprises 39 clearly written chapters from leaders in the field. Cutting-edge theory and research is presented on core psychological motives, such as the need for esteem, security, consistency, and achievement; motivational systems that arise to address these fundamental needs; the process and consequences of goal pursuit, including the role of individual differences and contextual moderators; and implications for personal well-being and interpersonal and intergroup relations.