Ok.....So you killed off Religion...

[pocaracas]

"...humanity would discover that all of the things they had attributed to their deities were simply inside of themselves all along."

Jesus said, "..the kingdom is within."

So, can we agree that God is essentially "good", and that our natural instinct is to be that way?

I'd go with... god is essentially "human nature", "common sense"....

Yes there will always be people who go against that. There will always be people who cannot live in society.
And yes, there are people who find it easier to live believing in the other world... If they didn't have that other world... I don't know, maybe they'd spend more time online, or playing games... other worldly stuff... but not that other world.