This book explores an eminently human phenomenon: our capacity to engage with the possible, to go beyond what is present, visible, or given in our existence. Possibility studies is an emerging field of research including topics as diverse as creativity, imagination, innovation, anticipation, counterfactual thinking, wondering, the future, social change, hope, agency, and utopia. The Possible: A Sociocultural Theory contributes to this wide field by developing a sociocultural account of the possible grounded in the notions of difference, position, perspective, dialogue, action, and culture. This theory aims to offer conceptual, methodological, and practical tools for all those interested in studying human possibility and cultivating it in education, at the workplace, in everyday life, and in society.