This book explains that everybody is susceptible to various biases that can lead to blunder during decisions choice. Mistakes make poorer and less healthy ; we often make bad decisions involving education, personal finance, health care, mortgages and credit cards, the family, and even the planet itself. The authors invite us to enter an alternative world, one that takes our humanness as a given. They show that by knowing how people think, we can design choice environments that make it easier for people to choose what is best for themselves, their families, and their society. Using colorful examples from the most important aspects of life, they also demonstrate how thoughtful "choice architecture" can be established to nudge us in beneficial directions without restricting freedom of choice.