Carol Dweck's career has been devoted to understanding the nature, workings, and development of children's motivation. This paper outlines the trajectory of her research including research on motivation in animals; the motivational impact of children's attributions, achievement goals, and mindsets about their abilities; how socialization practices affect these mindsets; how interventions that change children's mindsets can enhance their motivation and learning. In addition, she outlines a new theory that puts motivation and the formation of mindsets (or beliefs) at the heart of social and personality development.