Nick the Pilot, hi!
I do not think people would be better off without religion. They would still fight wars for land, natural resources, xenophobia, etc. Politicians would find a way to make people fight no matter what. Proof is in the 20th century. We saw the rise of communism, an atheistic approach to running a state and ruling a people. Thousands perished under communism simply because they were deemed threat to the state or did not agree with it. No matter what, people would hold beliefs or convictions, they just may not formally call it a religion. If state is all you care for on the surface and the government sets the rules of what you can and cannot do, say, etc., and whether you can prosper based on your political affiliations, then it is a form of religion. It's just godless. Modern China sets that example. The Chinese government has made attempts to crush any formal religions and limit their freedoms. Priests have been imprisoned. Muslims have been forced not to fast Ramadan in schools and to sell alcohol in their shops, all for the reason to "weaken" Islam. Another godless religion is in North Korea. It's leader is deemed god, he sets the rules and punishes whom he wills in the state. No formal recognized world religion is acceptable and practice of any other religion is punishable by the state law. Are the Chinese or North Koreans any better off? No. They just replaced recognized religions with atheistic statehood religions. If any atheist is convinced that a Utopia without any beliefs is possible, they are mistaken. As long as megalomaniacs are in power, humanity will always have a religion in place. It just might not be teaching charity, fasting, ritual prayer, etc. It would focus on state laws, its leadership and state defense.