In the Russian SFSR, for example, Chairmen of the Government of the ASSRs were officially members of the Government of the RSFSR. Unlike the union republics, the autonomous republics only had the right to disaffiliate themselves from the Union when the union republic containing them did so, as well as to choose to stay with the Union separately from them. The level of political, administrative and cultural autonomy they enjoyed varied with time—it was most substantial in the 1920s (Korenizatsiya), the 1950s after the death of Joseph Stalin, and in the Brezhnev Era.[1]