International man of history. Author, broadcaster, @HooverInst senior fellow. Latest book is Kissinger, vol. I: The Idealist (Penguin, September 2015).

Working with entrepreneurs to solve the world's hardest problems.

We help companies, causes, and campaigns identify and understand audiences, develop and amplify messages, and turn supporters into evangelists.

dogo is free-to-use software that helps you get feedback on your pitch deck and share it with investors