Within Comecon, there were occasional struggles over just how this system should work. Early on, Nikolai Voznesensky pushed for a more "law-governed" and technocratic price-based approach. However, with the August 1948 death of Andrei Zhdanov, Voznesensky lost his patron and was soon accused of treason as part of the Leningrad Affair; within two years he was dead in prison. Instead, what won out was a "physical planning" approach that strengthened the role of central governments over technocrats. At the same time, the effort to create a single regime of planning "common economic organization" with the ability to set plans throughout the Comecon region also came to nought. A protocol to create such a system was signed January 18, 1949, but never ratified. While historians are not unanimous on why this was stymied, it clearly threatened the sovereignty not only of the smaller states but even of the Soviet Union itself, since an international body would have had real power; Stalin clearly preferred informal means of intervention in the other Comecon states. This lack of either rationality or international central planning tended to promote autarky in each Comecon country because none fully trusted the others to deliver goods and services.