This was marked as Science Fiction in my library. I don't know what I would call it. The story revolves around a village and spans generations. Since it happens in prehistoric times, I suppose it could be fantasy. Although, the traditional hallmarks of fantasy - magic, good vs evil, non-humans - are not there.
If you want to know about the life of hunter-gatherers, this is the book for you. The setting, traditions and rituals of their lives is richly laid out. The characters are bit thinner. There were a few things that felt anachronistic to me. But having no knowledge of the time period, I could be completely wrong.
It was an interesting journey.