Would it?
In many ways it would, because there has been so much bloodshed, torture, misunderstanding between humans because of their different religions and all done in the name of their god. Today everyone still wants their faith to be right & many arguments have been had over who is right and wrong.
Then again religion has kept many people in check - doesn't allow the masses to run around willy nilly in their freedom. It controls the masses.
For me personally - I would say No Religion makes for a happier/better existance.