Source: chasingamazingblog.com
Chapter Three: Spider-Man and the Thing Defeat Thanos
So Thanos went through the typical break-up ritual: He hung around in his underwear, ate some ice cream, plotted to kill every single being in the universe…you know the drill.
Yeah, he decided to win Death back by giving her every living creature. I have to say, this is a flawed plan. Like, being Death is her job. By killing everything, you are just massively overworking her, and then making her immediately obsolete. Nice gift, Thanos. You coulda just given her your helicopter.
So Thanos decided to go about achieving this goal by collecting the Soul Gems. I've gone over the whole deal with the Soul/Infinity Gems/Stones in a PREVIOUS ARTICLE. Here, I’ll just say that they're all the same thing.
Thanos collected almost all of the Soul Gems, except the one in Adam Warlock's head. He didn’t want to deal with that. Then he captured Captain Marvel and the Avengers, and wound up killing Adam Warlock for good measure. Looking good, Thanos, you're rocking this whole thing.
Then Spider-Man and the Thing showed up. They found a way to resurrect Adam Warlock, and he imprisoned Thanos in stone, where he’d live an unholy half-life without the escape of death. Cold, Adam, cold.
Lesson Thanos Should Have Learned: If you're going to get your girlfriend a present, first make sure it's something she actually wants.

