“And pretty much isolated. “
I happen to believe the isolation was by design. It is as if the creator knew we would just kill each other if we lived too close together. “keep ‘em separated”
Which is why our solar system/Earth is at the outer most part of the Milky Way spiral. There’s nothing behind our system at all but the deep universe.
If the goal was to prevent people killing each other, why are their 8 billion people on this small planet?