Originally posted by celestialdemon
Going from world devourer to brother to Eternity is a change in status not power. Back then, what other cosmic being was there for him to fight? He didn't have Aegis and Tenebrous back then, so we don't know how he would have faired if he would have fought them back then.
But he wasn't shown as being as powerful as he is today. The korvak thing happened along time ago. and so did the beyonder saga. there have been cosmics around for a long time. Galactus is more powerful than Odin and Galactus back in the day was only shown as being as powerful as a hand full of planets. So he had to have grown in power. Thus making the UN aslo grow in power. It states right on panel that the UN would destroy the Universe. then years later, the Un is able to destroy and fix the Multiverse. IRGo the UN grew in power and as a part of Big G, so did galactus.