William Jefferson "Bill" Clinton is an American politician who served as the 42nd President of the United States from 1993 to 2001. Inaugurated at age 46, he was the third-youngest president. He took office at the end of the Cold War, and was the first president of the baby boomer generation. Clinton has been described as a New Democrat. Many of his policies have been attributed to a centrist Third Way philosophy of governance. Clinton left office with the highest end-of-office approval rating of any U.S. president since World War II. Since then, he has been involved in public speaking and humanitarian work. Based on his philanthropic worldview, Clinton created the William J. Clinton Foundation to promote and address international causes such as prevention of AIDS and global warming.