Would we have the same morals and ethics if it wasn't for the influence of religion.

Basically the theory of evolution is a young one. Our society has in a way been built on religion. I am not sure that without organised religion we would have the same understanding about what is percieved to be right and wrong. So what I am saying basically is why are some people so against the concept of god and religion when maybe we have something to thank for it. It is not the belief itself that cause harm but the interpretation and action upon that beilief surely.