For all that, Nooyi remains profoundly personal. She told the BBC in March that she calls her mother in India twice a day. "At the end of the day," said the CEO of one of America's biggest enterprises, "don't forget that you're a person, don't forget you're a mother, don't forget you're a wife, don't forget you're a daughter." When your job is done, "what you're left is family, friends, and faith."
Michael Useem is director of the Center for Leadership and Change Management at the Wharton School, University of Pennsylvania.