Confucius
Legendary
Confucius was a minor official who wandered China for years, mostly ignored by the rulers he advised. His students wrote down his teachings on family, respect, and good government - and those notes shaped East Asian civilization for 2,500 years. "Do not do to others what you do not want done to yourself," he said, five centuries before the Golden Rule.
Raises output in every age you own, and most of all in their own. Every level doubles what they add.
