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In US, the society didn't just "add rules against it". If you recall, the slavers first had to be beaten with a very big stick.
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society literally had to break down for years in order for us to add rules against it

https://en.wikipedia.org/wiki/American_Civil_War

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and your point is?
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That we operate as a society within the confines of the law. And the confines we exist in can be changed if the majority don't agree that something isn't right.
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Actually there are specific confines that cannot be changed by majority. Might I refer you to the US Constitution, which itself constrains which laws are flexible and which are not, and which this administration has run afoul of now on hundreds of occasions?
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