Boss
Take a Memo:
they're just a pile of bones.
Says someone who denies Science.
Those of us who understand how Archaeology works, understand we can learn a lot from "just a pile of bones" and what we've learned from Lake Mungo is that humans then were spiritual. They practiced ritual ceremony burial and cremation of the dead using red ocher and there is no practical explanation other than spiritual belief.
So if humans were spiritual 40k years ago, human spirituality already existed for thousands of years before you say the first human civilization existed... proving my point that humans have been spiritual as long as humans have been civilized. Your concession is duly noted.