You don't see how humanity have benefited from religion? Then you sir, are a moron.
How would you go around explaining say 15th century unwashed, illetarate masses what is good and what is bad? The fear of the law enforcement was virtually non-existant, you could commit shitloads of undetected crime. So go on, tell me how would you explain to some average dumb peasant that stealing/raping/killing (when no one sees you) is bad. The belief in magic sky fairy did and still does an amazing job.
Interestingly, the state of the 15th century peasant was a direct result of religion and was not improved by the church. Most improvements began around the time of the renaissance (not exactly known for espousing christian virtues, eh?).