Looking at the track record of humanity seems to be a pretty good indication, from my perspective at least, that we aren't doing too well on our own.
And for the last 2,000 years, we've been living under an Abrahamic hegemony and followers of Abrahamic religions make up over half of the human population. So whose fault is it? Christians and Muslims committed genocide all around the planet, wiping out the indigenous cultures of much of the world which has left us with not too many other alternatives and what little is left has been poisoned by Christians so we don't really know what the actual cultures believed since many of them relied on oral traditions that have been wiped out.
Time to take out that mirror and give it a long, hard look.