In this work the author, a recipient of the Nobel Prize in Economic Sciences for his seminal work in psychology that challenged the rational model of judgment and decision making, has brought together his many years of research and thinking in one book. System 1 is fast, intuitive, and emotional; System 2 is slower, more deliberative, and more logical. He exposes the extraordinary capabilities, and also the faults and biases, of fast thinking, and reveals the pervasive influence of intuitive impressions on our thoughts and behavior. This author's work has transformed cognitive psychology and launched the new fields of behavioral economics and happiness studies.