Ancient philosophers were very interested in the themes of laughter, humor, and comedy. They theorized about laughter and its causes, moralized about the appropriate uses of humor and what it is appropriate to laugh at, and wrote treatises on comedic composition. Further, they were often merciless in ridiculing their opponents’ positions, often borrowing comedic devices and techniques from comic poetry and drama to do so. The volume is organized around three themes or sets of questions. The first set concerns the psychology of laughter. What is going on in our minds when we laugh? What background conditions must be in place for laughter to occur? Is laughter necessarily hostile or derisive? The second set of questions concerns the ethical and social norms governing laughter and humor. When is it appropriate or inappropriate to laugh? Does laughter have a positive social function? Is there a virtue, or excellence, connected to laugher and humor? The third set of questions concerns the philosophical uses of humor and comedic technique. Do philosophers use humor exclusively in criticizing other rivals, or can it play a positive educational role as well? If it can, how does philosophical humor communicate its philosophical content? This volume aims not to settle these fascinating questions but more modestly to start a conversation about them, in the hope that the volume will be both a reference point for discussions of laughter, humor, and comedy in ancient philosophy and an engine for future research about them.