Selection is all about differential death rates and differential fertility rates. Death used to be far more important for human selection, and marriage developed to enable men to contribute directly to the resources available to their children, increasing survival.
-
Show this thread
-
Today, selection is much more about differential fertility. Selection has become much more about: 1. Which women are bearing the most babies, and 2. Which sperm is impregnating those women.
1 reply 4 retweets 9 likesShow this thread -
It wasn't always like this because merely bearing the most babies was not always optimal due to death rates. #1 is mostly about women's choices and options these days, and it varies widely by country.
1 reply 3 retweets 9 likesShow this thread -
Since sperm is in practically limitless supply, #2 is also mostly about female choices plus some male-male competition. Tweets related to this comment:pic.twitter.com/gUeiu3NaDt
1 reply 2 retweets 10 likesShow this thread
What's really important about all of this is that if you want a nice, sustainable society with traditional families, advancing tech, and high resources per person, you'd better make sure you're selecting for it. Currently we're not.
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.