[GuiA]

> we see that on average 57 percent, 64 percent, and 67 percent of children born survive to age 15 years among hunter-gatherers, forager-horticulturalists, and acculturated hunter-gatherers.

https://condensedscience.wordpress.com/2011/06/28/life-expec...

Still bad, but much better than 3 in 20.