Originally Posted by xeno000
As much as Thor wants to be Earth's protector and champion, he can hardly hope to prevent humanity from engaging in conflict and war without resorting to the sort of dictatorial rule Loki attempted. Nor, truly, would Thor want to force humans to behave as he wished. His goal is to protect the Earth from massive threats it cannot withstand, such as Loki's own army invading from space. That was Thor's point when he said, "Then you miss the truth of ruling, brother. Throne would suit you ill." Thor is a protector, not a dictator, something Loki cannot understand.
I agree. It's good for Earth's growth to tackle its own problems to the extent it can, with Thor there to assist if threats emerge that are beyond Earth's current capability.
That could also possibly be a reason why he doesn't exercise his full power when fighting alongside the rest of the Avengers, and let some of the others appear to be the key members. He's not trying to do the task for them, but rather keep everyone from being overwhelmed.