All the leaders one after another accepted the Earth Leader's proposal, especially those that led smaller countries that would benefit from the support and cooperation of the entire continent the most.
Within a few minutes, all of the leaders agreed and submitted to the Earth Leader, which they would have done even if he hadn't surpassed them in terms of strength, just out of respect and admiration of his character.
All of the leaders, apart from the Gamma King who out of pride couldn't submit to the Earth Leader despite knowing that even if the Earth Leader wasn't stronger than him, he would have been worthy to be the leader of the continent.