Religious belief doesn't seem to be required to make society better for humanity. In fact, there does seem to be evidence to the contrary.
Some Christians seem to think that religious belief is necessary to keep psychopathic tendencies under control, that it is needed to from a moral base for living. (Yes, not all!)
However, there is no evidence that society needs religious guidance to function well as a society:
Germany, Norway, Sweden seem to show that religious belief is not a required component for society to function well.
In fact, there seems to be substantial evidence that lack of religious guidance is more effective for running a society well.
One study on lack of belief in a god or gods:
http://www.pitzer.edu/academics/faculty ... theism.pdf
Theist vs atheist countries;
http://www.theblaze.com/stories/2012/08 ... countries/
http://www.huffingtonpost.com/2013/07/2 ... 40033.html