People should visit an old cemetery from the 19th century or earlier. Or just read birth/death records online. You'll see child after child after child. The reason average life expectancy was so low prior to the 19th century wasn't that people died significantly younger than they do today, it's because so many of them never made it past being toddlers. In much of the world that is still true.
We live in the most perfect earthly place that humanity has yet experienced. And rather than moving to make it even better, as our parents and grandparents did, so many today take it for granted and even want to tear it down.
It amazes me that their are so many people that have no appreciation for everything that’s available to us in America. I feel blessed to be living here. In Nam we referred to our country as “THE WORLD!” God Bless The USA!