God Emperor of Dune
is the 4th book in the Dune series by Frank Herbert
Leto II's prescience allowed him to see into both the past and the future, and he believed that ten thousand years of rule by the Faufreluches had allowed the human race to become stagnant, and that drastic action on Leto's part was needed in order for the human race to survive.
Leto II was also aware that a likelihood existed that the Thinking Machines, before they were destroyed in the Butlerian Jihad, had scattered. A stagnant human race would have little chance should the machines return. The entire purpose of "Leto's Golden path" was to force the human race to abandon certainty, security, and safety as individual goals and to "scatter" not only geographically, but also to do so technologically, ideologically, and socio-politically.
Colonising the Moon, then Mars, then the Asteroid Belt…
… and then Ross 128b, only 11 light years away
Humanity is about to begin The Great Scattering