The book takes us on a well-defined neuroscience-based tour of habits change, and exposes "easy solutions" that are not backed by science. It explains how dopamine is necessary for building habits and how the battle between habits and goal-directed behaviors reflects competition between different brain systems. Meanwhile, we learn how cues stimulate habits; why rules should be made, not decisions; how stimuli in the modern world dominate the brain's habit-making machine and lead to drug abuse and other addictions; And how neuroscience might one day break habits. Moving from the individual to the community, the book also discusses the massive changes in habits that will be required to meet the greatest challenges of our time.