Robert Baden-Powell

Lieutenant General Robert Stephenson Smyth Baden-Powell, 1st Baron Baden-Powell, (22 February 1857 – 8 January 1941), was a British Army officer, writer, founder and first Chief Scout of the world-wide Scout Movement, and founder, with his sister Agnes, of the world-wide Girl Guide / Girl Scout Movement. Baden-Powell authored the first editions of the seminal work Scouting for Boys, which was an inspiration for the Scout Movement.

Source: Robert Baden-Powell, 1st Baron Baden-Powell on Wikipedia