Why do people who don't agree with eachother live in the same area?

From a relationship perspective, it makes finding friends and a spouse much harder.
From an ecology perspective, it risks species extinctions.
From a political and legal perspective, no matter who runs the area or what laws get enacted, some or many will be unhappy.
From an architecture perspective, it makes towns and cities look disjointed and ugly.
From a local hangout perspective, one person's haven is another's nusiance, and from a pets perspective, the same applies.

People should be around those who agree with them. Those who like and want the same things.

But thats idealistic, in reality you can't just up and leave your family just because you don't agree with them or the majority in your area.

So whats the solution? How can people live how they want when others around them make that impossible?

Why do people who don't agree with eachother live in the same area?
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