Emotion, like motivation, is derived from the Latin word movere (to move) and is one of the primary forces that activates or energizes our behaviors. Both emotion and motivation have important influences on many social and cognitive processes and can shape the way we navigate our social world. Emotion also has important implications for political behavior, as recent research has shown that emotion can contribute to political polarization, attraction to “fake news,” and the spread of misinformation. The field of affective science examines the nature of our emotional experience, expression, and the mechanisms with which we regulate these processes. Taken together, this field has important implications for our day-to-day lives, and for society more broadly. In this volume, we will provide a brief sampling of some of the areas of research that have been dedicated to elucidating the role of emotion and motivation in shaping human behavior.