This should not discourage further answers, but here is an earlier response on this subject: https://www.reddit.com/r/AskHistorians/comments/2mylim/how_did_nomadic_tribes_deal_with_crying/ by u/anthropology_nerd

They also suggest the subreddit u/AskAnthropology . There are old threads on the topic of crying infants there, which can be found via search, and/or you could start another if you wish.

Ths deals wth prehistorical human origins. It would be better answered in /r/AskAnthropology.