Religion does exist and only one God that exist. The earth does not created by itself. Here a simple trick, take a small glass, throw in into mid air, and let it fall down as the gravity pull it, Leave it for 10 Years. come back and see what happen. Yes, it does not move even abit! Dont worry, leave it for even thousand years, nothing will happen to the glass. Just the same ol glass.

So, there are someone 'upthere' who create everything.

In conclusion, yes human do need religion.