Is more data always better? Do algorithms really make better decisions than humans? Can we stay in control in an increasingly automated world? Drawing on decades of research into decision making under uncertainty, Gerd Gigerenzer makes a compelling case for the enduring importance of human discernment in an automated world that we are told can - and will - replace our efforts. From dating apps and self-driving cars to facial recognition and the justice system, the increasing presence of AI has been widely championed - but there are limitations and risks too. Humans are the greatest source of uncertainty in these situations and Gigerenzer shows how, when people are involved, trust in complex algorithms can lead to illusions of certainty that become a recipe for disaster. Filled with practical examples and cutting-edge research, How to Stay Smart in a Smart World examines the growing role of AI at all levels of daily life with refreshing clarity. This book is a life-raft in a sea of information and an urgent invitation to actively shape the digital world in which we want to live.