I loved the movie, it was an old fashioned film.
Why did he not go back? Because he wasn't about to abandon the gal and her little brother. He had a chance to alter history this time, where he had failed before.
I also suspect that he ran into the temporal paradox problem. You can't change what has already been. If you go with some theories, you can only create a divergent reality/timeline. In essence, a parallel universe.
He killed the albino leader because he had to at least try preventing him and his kind from becoming the future of humanity.
It was pretty muddy at that point in the film, it could use a Director's Cut. "It wasn't great when I started, George Lucas started, all of us started. I really thought we were going to leave the motion picture industry or field better than we found it, and we left it worse."
-- Francis Ford Coppola
A little nonsense now and then,
Is valued by the wisest men.
-- Willy Wonka
Voice of Reason and Ship's Psychiatrist of the Institution
Relentlessly Persuing the Happy Medium |