Tal Ben-Shahar is an author and lecturer at Harvard University. He taught the most popular course at Harvard on "Positive Psychology" and the third largest on "The Psychology of Leadership"--with a total of over 1,400 students. Tal consults and lectures around the world to executives in multi-national corporation, the general public, and at-risk populations. Topics include happiness, self-esteem, resilience, goal setting, mindfulness, and leadership. An avid sportsman, Tal won the U.S. Intercollegiate and Israeli National squash championships. He obtained his PhD in Organizational Behavior and BA in Philosophy and Psychology from Harvard.