His meddling with the DC Universe to satisfy his curiosity shows extreme apathy. He has altered the timeline so much, that several events and people were altered or wiped out. However, thanks to the Convergence, Wally West and Superman, much of the damage was undone, though Manhattan wasn't deterred from continuing his experiment. He erased the Golden Age by preventing Alan Scott from getting his powers and helping form the JSA, in the process erasing the Legion of Super-Heroes as well. He remained indifferent to a survivor who avoided erasure.