The hardest choices require the strongest will
Thanos, also known as The Mad Titan, is a Titanian Eternal created by Jim Starlin and Mike Friedrich who first appeared in Iron Man #55 back in 1973. His basic abilities are super strength, speed, and longevity. He can manipulate energy, is telepathic, and telekinetic.
He is dominant introverted and also had huge plans for the entire universe, in which he wants to repopulate the earth by destroying half of all life forms. Gods would do that wouldn’t they?