This book provides an overview and analysis of the thought of figures across the human and social sciences on the character, causes, and consequences of discontent in modern societies. Exploring the important social and cultural conditions associated with modernity, it focuses on the contributions of 38 prominent scholars from the late nineteenth and twentieth centuries – philosophers, historians, and social scientists – on the subject of discontent and social malaise, and individual and collective well-being. Thematically organized, this volume offers brief portraits of the lives and key ideas of these thinkers, leading toward a presentation of modernity as a “differentiated complaint.” Reclaiming an important tradition in the human and social sciences that sees life on a grand scale, that integrates personal affairs with social and cultural matters, and that dares people to recommit themselves to this broader vision of human involvement, will appeal to readers across the social sciences and humanities, particularly those with interests in social theory, sociology, and philosophy.