Thus, we only need people to act intelligently. We can do without faith. People can do without faith. They can't do without reason. It is usually argued, of course, that we need religion in order to get humanity to behave and work together.
All evidence is to the contrary.
Religion has not notably improved human behavior. The pagan Romans were far kinder than the Inquisition Christians. Nor has religion united Christians, Muslims, Buddhists, or Jews. It has quite unmistakably divided them. In fact, religion will never unite them, because a religion requires that they all share the same beliefs, without offering any reliable evidence that their ideas are more correct than anyone else's.