Charlie Munger is an American investor, businessman, and philanthropist, best known as the vice chairman of Berkshire Hathaway, a multinational conglomerate led by Warren Buffett. Born on January 1, 1924, Munger has played a significant role in the company's investment strategies and decision-making processes, contributing to its growth and success over the decades. In addition to his work at Berkshire Hathaway, Munger is the chairman of the Daily Journal Corporation and has been involved in various philanthropic efforts, particularly in education and healthcare. He is known for his rational thinking and emphasis on multidisciplinary learning, which he believes is essential for effective decision-making.