It has only become volatile after the Ottoman Empire collapsed. Was quite stable and safe before. It's just they didn't have nations before, were colonised and controlled by Ottomans while in Europe we had nation-states and nationalism since ~17 century and had enough time for cleansing to organise mono-ethnic, cohesive states. While even that, was only finished decisively by post-WWII "population transfers" (which was nothing but ethnic cleansing sold as a good thing).

They are still just starting on it.

Ethnic states are a things, albeit quite debatable since ethnicity is an entirely contingent and subjective construct. Monoethnic states are the dream of genocides, not ever a reality on the ground (doesn't matter how you define ethnicity).

Well where in a state there's no word in a language to differentiate between a citizen and someone of a title ethnicity, i can call it an ethnostate. Say Armenian or Polish: there's no 2nd word in their languages for that. Because there are so few citizens who aren't of title ethnicity, and they are so marginalised and subject to such a quick assimilation, there isn't even a need to bother inventing a word.

If there is such a word say, "Kazakh" vs "Kazakhstani" or "Russkiye" vs "Rossiyane", existence of such a word shows that this state is an empire.

Sometimes the "ethnic" word simply doesn't exist, say in "Canadian" or "American" for U.S.: it's only citizenship, there's no ethnicity at all - neither the word nor substance - showing a "melting pot" country.

You're resting an awful lot of political and sociological thinking on a very superficial bit of very arbitrary linguistics.

I mean, concluding that Kazakhstan is an empire while the US is not pretty much discredits the whole thing.

That's as simple as having vs not having a title ethnicity in the country. If there's no title ethnicity it means there's just citizenship, no one subjugates another: it's a melting pot. Kazakhstan in particular, in any case, is moving towards an ethnic state, as every other ethnicity except Kazakh has very low birth rate there so in a few generations it will become homogenous.

> If there's no title ethnicity it means there's just citizenship, no one subjugates another

That's a wild, unwarranted and patently wrong statement.

Cradle of religion you mean

Writing first shows up there, the first cities do as well.

Oil funds the volatility.

US oil production alone is close to the total output of "that region".

It has also been incredibly stable for incredibly long periods of time.