Do you think spiritual apartheid would work?

No, it wouldn't. People would be coming over on conversion vacations. We'd probably have another couple Holy Wars.

And I rather like having a mix of people around, it keeps me on my toes.

No, you would have to break it down even further. There are hundreds of kinds of christians, for example, and while most can get along most of the time in places like the US, there are also the Catholics and the Protestants in Ireland who seem to not be able to. Even atheists have more than one type, anarchists being one. They wouldn't want any type of government at all, where some of the other atheists would. Humans tend to find reasons not to get along, just look at families, by and large they should have more things in common within a family than you would have with anyone else, but many family members can't stand each other.

No because there will always be something to fight about. Even in atheistic countries. Competition is instinctual. I think we would try a little harder though. I think the atheistic country(ies) would experience a cultural and scientific boom, but money and economic unfairness would still exist. Greed would still exist.

Plus, even if we could stop all in fighting in the respective nations, we would still have fighting betwixt them. And whether knowingly or not, it would most likely be over resources.

Nope. Pakistan and India tried it, based upon religion and it's just made them hate each other worse.

What we don't know we distrust and ultimately hate and fear.

Why do you think atheists think we're trying to turn this place into a theocracy, and why do you think we Christians fight to protect our religious values? Because we can't come to the table and get to know one another.

So, our system may not be perfect, but it's better than two separate nations.

no. what happens if you grow up in one country and think the beliefs are a load of crap? do you just leave the only home you've ever known?

or if you do that, if one belief gets really popular, won't there be an unfair number of people crowded into a smaller space?

No, not even hypothetically. Have you ever heard the saying "life it too short to only learn from your own mistakes"?

Seeing silly people in action usually brings out the best in me.

been tried.... sorry

eg; yugoslavia /bosnia /serbia

india /pakistan /bangladesh(east pakistan)

How un-American.