Linus T explicitly licensed Linux under a license that allows anyone to run it but requires people who modify modifications to share those modifications.

If you build good infrastructure you reap the rewards.

A lot of things are much more efficient in China as well. Compare the cost in time and money for travel between Beijing to Shanghai vs New York to Chicago for example.

If you think that fathers taking care of their kids is an "edge case in parenting" I don't really have anything to add.

"People in their 20's will see peak world population in their lifetime. It will be fascinating to see how society changes over the decades that follow that."

I am 45. I have fairly big* chance of making the global population curve actually drop!

*OK, not really, but you get the point I hope....