Robert Pershing Wadlow ( February 22 , 1918 - July 15 , 1940 ) , also known as the Alton Giant and the Giant of Illinois , is the tallest person in history for whom there is irrefutable evidence .
Robert Pershing Wadlow ( February 22 , 1918 - July 22 , 1940 ) was one of the tallest people who ever lived .