The soviet union was indeed in a constant state of turmoil and siege. From aggression by imperialists on the outside, and sabateurs and fascists on the inside that sought to reinstate capitalism, the socialists were forced to take the very real threat of infiltration seriously. In the purges, the large majority of those found guilty were expelled from the party, with executions largely reserved for those guilty of extreme crimes. Even then, excess did occur, and when the Politburo learned that the NKVD was playing it more fast and loose, they were ordered to stop.

Do you believe that there wasn’t actually a serious threat of internal espionage and conspiracy? Do you believe that all of the ruling classes that were stripped from their Tsarist privledges simply gave up after the Russian Civil War? How do you suggest the soviets respond to such threats?

As for it only lasting 40 years, the 1977 constitution was more of an expansion on the 1936 constitution than a complete rewrite. It’s progressive social guarantees remained intact.