American folk singer Pete Seeger, who co-wrote enduring songs like "If I Had a Hammer", and in turn became a leading voice for social justice, died on Monday at the age of 94.<br/> <br />He was variously hailed in social and traditional media as a "hero", "America's conscience" and "A man of the people".<br/> <br />Seeger died of natural causes at New York-Presbyterian Hospital, according to his record company Appleseed Recordings.<br/> <br />He was well known for his liberal politics, working as an environmentalist, and protesting against wars from Vietnam to Iraq.<br/> <br />He celebrated his 90th birthday in May 2009 with a concert in New York's Madison Square Garden that drew 15,000 spectators and performers.
