The lost paradise

The Earthians who were war against to each other in with weapons, concepts, politics, businesses, were started to reunion with each others quickly. The challenge which is in front of them now is, never before in human history. So they had no any other choice except reunion with each others. But, when they saw the risk of the challenge which they have to face, they realized, that their whole power also not enough. Humans had made a worst mistake by not work together in their whole history.