I discovered the ultimate answer to the question: "what law would you make if you were king of the world for a day?"
If I could make one law, this is it: Every high school student is required to spend one year in a different country, on a different continent (in a homestay).
Think about what kind of a young population we'd have if every young person in the country had a year's experience on a different continent, imagine how diverse the viewpoints and thinking styles would be! Imagine how impossible tribalism and bigotry would be to maintain! And I'm not just talking about first world countries -- every country. Wouldn't that be interesting? I like it.
Nothing personal, but the countries that need it most are the isolationist ones: America and Canada are too rarely exposed to a REAL paradigm shift in cultures. Island nations like Japan and England could benefit. Korea would benefit (Korea is functionally an island right now because North Korea is blocking it off from the mainland, and it's been known as isolationist all through its history: hence the nickname "The Hermit Kingdom"). Even countries like Belgium or Austria, which are surrounded on each side by different cultures and countries, would benefit from a trip to a whole other continent. It would also teach hospitality, and patience in the home countries, as each country played host to students from all over the world, even while it sent its students abroad. Students who travelled to third world countries would see the need, and it would be an immediate, urgent thing, rather than just a theoretical, distant, "Think of the kids in Africa" velleity.
There we go. That's MY way to fix the world. It would take some time to bear fruit, but wouldn't it be interesting to see how it played out?
(PS: velleity is the word of the day. Its definition is "a mere wish, unaccompanied by an effort to obtain it." -- a wish to do something that is not strong enough to take action. "oh. I should work out more often." "I should clean my room." "I should really organize my desk" "It would be nice to travel some time")