- Bill Behrens
- Self (co-author of The Limits to Growth)
- George Bush
- Self
- Jimmy Carter
- Self
- Jay Forrester
- Self (The MIT project team member)
- Alexander King
- Self (Club of Rome)
- Sicco Mansholt
- Self
- Dennis Meadows
- Self (co-author of The Limits to Growth)
- Donella Meadows
- Self
- Peter Milling
- Self (The MIT project team member)
- Aurelio Peccei
- Self (Club of Rome)
- Jorgen Randers
- Self (Club of Rome)
- Ronald Reagan
- Self
- John Sterman
- Self (MIT Sloan School of Management)
- Diane Wright
- Self (Donella Meadows' assistant)
- Erich Zahn
- Self (The MIT project team member)
