While religion has it's bad points and good points, and most are bad, how exactly are you to retain humanity's ways without having religion? Because with imagination comes the ability to imagine an afterlife. In other words, you can;t eliminate religion without eliminating imagination. because if you were to get everyone to say no to religion, there would always be a kid who never grows up and thinks the ghost he saw as a kid was real and will not admit being wrong. And if you were to create an isolated society of atheists with religion removed, like all nations, there would come a time when interaction, trade, or other contact would be needed, and like it or not, multiculturalism is a natural result of trade and the likes. And like it or not, someone in a society will always think something opposite to the accepted way.
So exactly how do you see your religion-less world ever existing?