If you don't know who Leto II is he's a kwisatz haderach http://en.wikipedia.org/wiki/Kwisatz_Haderach
Basically it's a superhuman that knows his entire genetic past both male and female where as the "Reverend Mothers" who are xx can only see their female past.
His father Maud'Dib or Paul Atreides who was the first Kwisatz Haderach and Leto was the second who found a form of immortality and became known as "The God Emporer".
He had a 3,500 year forced tranquility he called the golden path which was the path he saw humanity needing to take based on his prescience
Safaris through ancestral memories teach me many things. The patterns, ahhh,
the patterns Liberal bigots are the ones who trouble me most. I distrust the
extremes. Scratch a conservative and you find someone who prefers the past over
any future. Scratch a liberal and find a closet aristocrat. It's true! Liberal
governments always develop into aristocracies The bureaucracies betray the true
intent of people who form such governments. Right from the first, the little
people who formed the governments which promised to equalize the social burdens
found themselves suddenly in the hands of bureaucratic aristocracies. Of
course, all bureaucracies follow this pattern. but what a hypocrisy to find
this even under a communized banner Ahhh, well, if patterns teach me anything
it's that patterns are repeated. My oppressions. by and large, are no worse
than any of the others and, at least. I teach a new lesson.
-The Stolen Journals