Warren Buffett is known as the "Sage of Omaha" and is one of the most successful investors of all time. He began buying stocks at age 11 and learned from value investing pioneer Benjamin Graham. Buffett founded Berkshire Hathaway and grew it into a multibillion dollar company through value investing. He looks for companies with sustainable competitive advantages, analyzes their intrinsic value compared to stock price, and takes a long-term view. Buffett's success demonstrates the power of patience, discipline and focusing on fundamentals rather than short-term fluctuations.