Leto II is the son of Paul Atreides and Chani, twin brother of Ghanima, and the most extraordinary figure in the Dune saga. Like his father, Leto possesses prescient vision, but unlike Paul, he is willing to follow the Golden Path to its full conclusion - merging his body with sandtrout to become a human-sandworm hybrid capable of living for thousands of years. As the God Emperor, Leto rules humanity with absolute tyranny for three and a half millennia, deliberately suppressing freedom and change to create an unbearable pressure that will eventually drive humanity to scatter across the galaxy and ensure the species can never be trapped or destroyed by a single catastrophe. His sacrifice - trading his humanity for the survival of his species - is the central moral question of the series.