Home to Titans, Titan was a rich, lush world with a royal family headed by A'Lars, who sired a son named Thanos. During this time, a Celestial named Arishem the Judge created ten Eternals and stationed them on Titan. One of these Eternals, named Eros, joined the royal family and became an adoptive brother of Thanos. However, Eros eventually abandoned Arishem's ideals and fled Titan, choosing to explore the cosmos. Titan was plagued by overpopulation, which caused a drain on its resources and sent the Titan race hurtling towards a societal cataclysm. Thanos proposed randomly killing half the planet's population as a way to preserve their finite resources, but his plan was rejected as too extreme, and he was cast out as a madman. The predicted catastrophe then hit Titan, causing the mass extinction of most of the planet's lifeforms, with Thanos being one of the few remaining survivors. The once green and blue world turned burnt orange and brown as the upper atmosphere was ravaged by electrical storms with the broken remains of Titan society littering its surface. Even its moon was not spared, taking on a similar appearance. On a planetary scale, Titan was left eight degrees off its axis with its gravitational pull also significantly affected. Convinced that his plan could have saved Titan, Thanos became dedicated to wiping out half of all life in the universe so as to spare other planets from suffering the fate of his own people.