This volume honors the work of Arie W. Kruglanski. It represents a collection of chapters written by Arie's former students, friends, and collaborators. The chapters are rather diverse and cover a variety of topics from politics, including international terrorism, to health related issues, such as addiction and self-control, to basic psychological principles, such as motivation and self-regulation, the formation of attitudes, social influence, and interpersonal relationships. What these chapters have in common is that they have all been inspired by Arie's revolutionary work on human motivation and represent the authors' attempt to apply the basic principles of motivation to the understanding of diverse phenomena.