Using drones, GOD put down the more destructive elements left from the remnants of earth's populations and started leading the remainder of the people, using bread wafers to keep them alive, he lead them into locations with the highest degree of resources and safety.
Regardless, population numbers continued to plumet, humankind was no longer resilient enough to deal with elements of the earth.
Ergo the decision to start cataloging and adjusting mankind's DNA to build a more resilient being.
Twelve remaining bunker facilities spread across the planet, constructed by various countries to shield against humankind's annihilation. The Bunkers now assigned to change, monitor and document the progress of humankind.
These Bunkers, designed by a mixture of military and science personnel to be the arks, designed to withstand even Nuclear War.
Supplied by various renewable power sources. Four even powered by nuclear energy.
Although GOD had not been able to eliminate death, after two hundred years of authorized breading, in most cases our modified humankind had an extended lifespan, incredible resistance to decease, enhanced physical abilities and an overwhelming drive to procreate.
Unfortunately, nothing built by humans can stand the test of time.