Changeology is about influencing human behavior for the better. It shows how to design an effective change project, with inspiring examples in areas such as climate change, obesity, AIDS, tobacco, and nutrition. It speaks to a worldwide audience of professionals and individuals who are acting to make change in their cities, neighborhoods, and corporations. The pressing issues of today clamor for solutions, yet a surprising number of social change efforts are based on little more than folk theories. This book dispels many of the myths that prevent change projects from succeeding, and replaces them with the best of what is known from projects that have worked. Changeology simplifies a vast body of theory and practice in to six principles: buzz, hope, enabling environments, sticky solutions, "can do," and the right inviter. These are explained with fascinating real-life stories and a look at the hard evidence.