Would there be chaos without religion?

Imagine the world without religion. No one believing that there's a heaven and hell. Not needing to redeem yourself from your sins.

I think religion holds people in place. It gives something for people to believe in and something to work for. Working hard to enter the pearly gates of the heavens or reach a state of enlightenment. Religion gives people a form of morale rules. Without it who knows how people will act. Do we really have the capacity to uphold the values and morales that we have today? Or will we live in a state of chaos without religion. Even with religion, there are still some atrocious acts being committed everyday. Then again religion have been the cause of some of the wars that humankind have fought about. It makes me wonder what our world will be if there weren't any religion. Will there be less philanthropists in the world?