There have been some great posts this week. Thanks. Not all posts need to be as well-argued and lengthy. Feel free to post shorter observations.

For example, see this article about teaching  children to swim in Australia:

Drowning prevention: Every six-year-old should be able to swim five metres https://www.smh.com.au/national/drowning-prevention-every-six-year-old-should-be-able-to-swim-five-metres-20200130-p53w93.html

Knowing how to swim is a basic survival skill in Australia. The interior is desert or marginal land, so 90% of the population lives near the coast, within two hours of a beach. The weather is tropical / subtropical so in almost every part of Australia you can swim in the ocean at least 8 months of the year. And it is a relatively rich country with good municipal sports facilities, including pools and many middle-class and upper houses and apartments blocks have private swimming pools.

We were all taught to swim as a school activity (bused to the local municipal pool), and we were encouraged to train for a get the Bronze Medallion, the basic lifesaver (lifeguard) qualification https://en.wikipedia.org/wiki/Bronze_Medallion_(New_Zealand_and_Australia)