Theodore Roosevelt Sr. was an American businessman and philanthropist born on September 22, 1831. He was the father of Theodore Roosevelt, the 26th President of the United States. Roosevelt Sr. was known for his successful career in the import-export business and was a prominent figure in New York society. He was also involved in various charitable activities, supporting education and health initiatives. Roosevelt Sr. was a strong advocate for physical fitness and the outdoors, which influenced his son's values. He passed away in 1878, but his legacy lived on through his children, particularly in the adventurous spirit of Theodore Roosevelt.