I've benefited greatly from studying many effective people from history. Among those who've influenced me the most are Ronald Reagan, Theodore Roosevelt, and Winston Churchill. Each of the three altered history; each was self-created to a great extent; and each was a great student of history and leadership.

Arguably there's no school for any high position of leadership. That said, Theodore Roosevelt was remarkably well prepared for the presidency. He had held executive positions in the military, in local government, in the federal government.

Dwight Eisenhower has been underestimated, which may relate to his advanced age in office, his somewhat uneven communications skills, and his failure to present a forward-looking vision on the rising issue of civil rights.

Ronald Reagan's career was so unusual, so unprecedented, that this would be very interesting to learn, to gain understanding of his way of looking at the world.

William Ewart Gladstone is credited with the credo that a prime minister must be a "good butcher." The metaphor is apt insofar as the root of the word "decision" is "to cut."

Wal-Mart, with its legendary focus on customer value in terms of price, is innovating in sustainability. Now, we're beginning to see the mirror image, a convergence, as the not-for-profit sector is beginning to serve more effectively by applying private sector accountability and efficiencies to social needs. This reflects a rising recognition that to serve others best requires more than good intentions; it mandates a focus on real-world results. Bill Gates and Warren Buffett are among the most conspicuous advocates and representatives of this transformation.

I often encountered books by academics and others who had not actually done what they had written about. They tend to create artificial simplicity; their prose doesn't have the vigor of "lived words." On the other hand, many practitioners lack the context or introspection to make their experiences and understandings transferable - and, in our time, many don't actually write the books they "author." My ideal is to unify theory and practice.