I am actually wrong about to 'unite as a single country' what I was meant is to 'unite in one world'.
Uniting people, whether as a globe, continent, country, island, state/region/territory, prefecture/province/bunde/special city/metropolis/etc., city/town/ward/special ward/designated city, neighbourhood, street, building, room, etc., it only works if people are accepting each other as equals, not if people are forced to accept each other or otherwise get bulled for being a racist.
Western countries in their current state are far from united, simply because multiculturalism simply can't work.
You can either have like minded people separated in their own areas, or a complete chaos among conflicting cultures, both might only work for a short term, but never long term.
Examples of what does work are mostly Asian countries, plus Poland.
Poland is mostly like minded, with the exception of people that live in parts that used to belong to Germany a half century ago.
Same thing can be said about Japan, with a constructed distinction between west Japan and east Japan in terms of people's cultures, with further separation in prefectures.
India is among the countries that does it well too, with each province being distinct from each other, allowing people to be who they are, and still be united as being Indians.
Most of the Islamic countries do a nice job too, until any kind of militant meddling happens.
Go to western Europe or North America, and you see many different cultures next to each other.
I really can say that people don't like each other that way, lost of hatred going among each other, and the obligation to locals to pressure their frustration only adds up to the problems, instead of solving them.
There are lots of foreigners in Japan too from many different cultures, but instead of them demanding locals to adjust themselves to foreigners, the government is demanding foreigners to adjust themselves to the locals, effectively uniting people, and making locals also more accepting towards foreigners.
So to sum it up, people can only be united if cultures are similar or the same, if totally different and nobody is willing to ditch theirs in favour for what is in charge in the country they are, any kind of uniting won't work.
