Religions that encouraged co-operation, trust and mutual support did that.

No they didn't. Otherwise there wouldn't have been so many differing ones, and even the inconsistencies within a single stripe would have been ironed out long ago. Religions survive as a superintendence of superstition owing to the vested material interests of those powerful few who promote them, be they economic, or militaristic, or (in the case of the RCC) both.

The overarching Godless reality exists regardless; it is not an idea as such, but a fact. All human life might be wiped from the planet in a single solar flash, and if anything survives at all it will be tangible nature, not supernatural mumbo-jumbo, at least not until the next wave of humans emerge and start making things up again.