We haven’t had to USE those laws for about a hundred years now.
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Alot has changed in 100 years.
The late 1910’s were a time when communism was perhaps even more on the ascendancy than it is now.
We likely had fewer narcissists though.
Yes. Now we have airplanes to move infected people across an ocean in a few hours. In the days of ship transport, the infected would die before the contagion could pass the ocean spans. The same applies within land masses with planes and cars that can move 1000 miles in day with ease.