How has Thanos's character evolved over the course of the Marvel Comics series?

Thanos's character has evolved significantly. He initially appeared as a villain driven by a desire for power. Later, he becomes more nuanced, grappling with the morality of his actions and the consequences of his choices. The Infinity Gauntlet storyline marks a pivotal moment where his motivations and actions are fully explored, revealing a tragic figure attempting to save the universe from destruction.