They have made a difference and revolutionized the world. They come from all walks of life and from all corners of the globe. These remarkable individuals have pioneered, developed, and forever improved their industry and the world in which we live. Engaging and relevant, these individuals will change the way you view the world and remind you that it only takes one person to make a difference. This episode features Barack Obama, Mikhail Gorbachev, Charles De Gualle, Bill Clinton, and Nicolas Sarkozy.

Originally released by Film Ideas, 2011. Streaming video file encoded with permission for digital streaming by Infobase on March 10, 2015.

Barack Obama: President of the U.S.A. (2:07); --Barack Obama: Nobel Peace Prize (2:22); -- Mikhail Gorbachev: New Thinking (2:14); -- Mikhail Gorbachev: Glasnost (2:16); -- Charles De Gaulle: Military Leader (1:51); -- Charles De Gaulle: Fifth Republic (2:37); -- Bill Clinton: Foreign Policy (2:10); -- Bill Clinton: Legacy (2:19); -- Nicolas Sarkozy: Leadership Positions (2:07); -- Nicolas Sarkozy: President of France (2:21); -- Credits: Heads Of State (Barack Obama, Mikhail Gorbachev, Charles De Gaulle, Bill Clinton, Nicolas Sarkozy): Advocates of Change (0:31); .