There is no perhaps, they had no beliefs in ANY deity, muchless God who created them. They had no crime, no sexual disfunctions, no tribal wars, all of which are definte signs of Consciousness.
Is such certainty warranted? You list features they lack, yet those features
wouldn't leave 'footprints' for us to see. So it is at least indeterminate.
Cave man sex....now we know it happened.
That reminds me of an old joke. Why do cave men drag women by their hair?
The answer is so revolting, that it would get me banned.