Heidi K. Gardner, PhD, is a Distinguished Fellow in the Center on the Legal Profession at Harvard Law School.  Her research focuses on leadership and collaboration in professional service firms. Gardner has lived and worked on four continents, including positions with McKinsey & Co. and Procter & Gamble, and as a Fulbright Scholar. She holds a BA in Japanese Studies from the University of Pennsylvania (summa cum laude, Phi Beta Kappa), a masters degree from the London School of Economics (with honors), and a second masters and doctorate in organizational behavior from London Business School. In this interview, we discuss how leaders (and all successful professionals) win by breaking down silos.