Warren Buffett's investment philosophy emphasizes understanding a stock's intrinsic value and potential future earnings rather than engaging in short-term price speculation. His early life experiences during the Great Depression shaped his approach to investing, focusing on patience, long-term thinking, and not fixating on short-term gains. Buffett's entrepreneurial endeavors from a young age and his partnership with Charlie Munger contributed to the remarkable success of Berkshire Hathaway. He is known for his philanthropy, including the Giving Pledge initiative, and his unconventional personal life.