The Four Laws of Behavior Change

Clear builds the laws on a four-step model of how every habit runs: cue, craving, response, reward. The cue is what you notice, the craving is the wanting it sets off, the response is the habit itself, and the reward is what satisfies the craving and teaches the brain to repeat the loop. The model extends the cue, routine and reward loop that Charles Duhigg popularized in The Power of Habit by separating the wanting from the noticing. Each law answers one step. A cue you never see cannot start anything, so the first law makes it obvious; a craving needs something to want, so the second makes it attractive; a response happens when it costs little effort, so the third makes it easy; and a reward fixes the loop only if it arrives quickly, so the fourth makes it satisfying. The framework's real power is diagnostic. When a habit fails, the question stops being 'Why am I so weak?' and becomes 'Which of the four steps is broken?' Most of Atomic Habits is a set of techniques filed under these four headings.