Ashish Nanda had been teaching at Harvard Business School for 13 years when then-Harvard Law School dean Elena Kagan approached him in 2007 with an unusual idea.

Kagan, the future U.S. Supreme Court justice, wanted Nanda to move to the law school to start a first-of-its-kind executive-education program for practicing attorneys. Unlike continuing legal education classes, which tend to focus on narrow areas of substantive law, Kagan and vice dean David Wilkins envisioned a comprehensive program designed to help lawyers develop leadership, management and business skills.