Nikos Mourkogiannis, author of "Purpose: The Starting Point of Great Companies", is a senior partner at Panthea, an elite leadership consulting firm providing advice to Chairmen and CEOs of top companies around the world. He is also senior executive advisor on leadership to Booz Allen Hamilton. Nikos helped create the Harvard Law School Center on Negotiations with Roger Fisher, author of the business bestseller "Getting to Yes". He has worked on some of the most complex and important business deals of the last thirty years, with some of the most influential leaders in international business and government. He lives in London.

Roger Fisher is the Samuel Williston Professor Emeritus of Law at Harvard, director of the Harvard Negotiation Project, and founder of two consulting organizations.
Daniel Shapiro, associate director of the Harvard Negotiation Project, teaches at Harvard Law School and in the psychiatry department at Harvard Medical School.