I'd argue modern religion pretty much saved civilisation and made it what it is.
After the fall of the Roman Empire, we could have been in the Dark Ages for much much longer than we were - long enough to descend into a spiral of barbarity. The gaps where the Roman Empire was - the things that it filled- government, judiciary, education, law and order - these were filled by pretty much the only remaining establishment in Europe - the Catholic Church. Say what you like about it, and from a modern perspective it was a rough ride - but it got Europe through to the Renaissance period. There was no such thing as a secular science-based movement that could have stepped in. It just didn't exist, and people weren't sophisticated enough.
No organised religion - at best we'd be somewhere between the Mongols and Tudors right now.