A resposta foi na mesma discussão. A conversa foi:
Gamora: I was a child when you took me.
Thanos: I saved you.
Gamora: No, no, we were happy on my home planet.
Thanos: Going to bed hungry, scrounging for scraps? Your planet was on the brink of collapse. I was the one who stopped that. You know what's happened since then? The children born have known nothing but full bellies and clear skies. It's a paradise.
Gamora: Because you murdered half the planet!
Thanos: A small price to pay for salvation.
Gamora: You're insane. - IMDb
Ele a salvou do colapso de seu planeta. De acordo com Thanos, seu planeta estava à beira do colapso. E ele a salvou daquele futuro matando metade da vida naquele planeta. Aquele planeta é agora um paraíso por causa dele.