No matter what you believe in, we are all human.
There isn't a purpose for us, we are just here to find a purpose, and until then people tend to believe in the unimaginable.
Whether there is truth of a god or not, we can not let that get in the way of our development. We do not want to repeat history. We do not want to create more tensions. We need to unify-- to advance.
Unfortunately not everyone can live with each other, and there will never be peace.
But if we accept each others beliefs, no matter how crazy they might be, the world may find grasp to such unification once again.
Long ago, ancient civilizations split up. There were separate religions, separate laws, and separate beliefs. Such civilizations fought for their beliefs, other then accepting each others. Such things happen even today-- Between Israel and the Muslims, And we do not want those things to happen in the future, So we have taken very light, careful steps towards peace.
There will, like i said, never really be peace. But for the tensions to settle down, I suggest to all of you to not give up your beliefs, and to accept others.
Economics
Religion
Power
-- The key, is to accept, then maybe there will be hope for unification.