Benjamin Wachenje

Title: Chief operating officer, Facebook; former vice president, sales and operations, Google; author, "Lean In: Women, Work, and the Will to Lead"

Born: August 28, 1969, Washington, D.C.

Education: BA, in economics, Harvard College; MBA, Harvard Business School

Early Marker: Chief of staff to U.S. Treasury Secretary Larry Summers

Big Idea: Continues to oversee the drive to grow Facebook's profits, especially now it is a public company; sustaining the Lean In movement she inspired with her book to help professional women achieve their career goals.

Wave of the Future: Gender diversity at work