What do people mean when they say that USSR was dissolved "illegally"?
I've heard this argument many times from fellow comrades that the USSR was dissolved "illegally". This claim has two sub-parts
The USSR was dissolved by external forces, as opposed to the people of the USSR deciding to dissolve it
The process of dissolution itself was "illegal"
Since I don't quite understand this argument due to a lack of knowledge, I wanna learn more. In particular, I want answers to these questions:
Did the USSR democratically decide to dissolve itself? If so, then it wasn't as much "dissolved" as it decided to dissolve itself. Now this might look like a linguistic critique, but what I'm asking is who, the people of the USSR or external forces, was mainly responsible for the dissolution of the USSR
What do we mean by the word "illegal". Legality and illegality implies a certain set of laws. But whose laws are we talking about? Are we talking about the laws of the USSR? Are we talking about international law? What exactly do we mean by the word "illegal"?