Thinking, Fast and Slow - A Complete and Detailed Summary The first chapter begins with Daniel Kahneman's description of two main characters of the book, neither of which are people. He refers to something that he calls System 1 and System 2. System 1 is dedicated to thinking fast. It almost solely relies on intuition and almost entirely disregards information. System 1 is in control every time we do an activity that requires quick thinking and reactions...