With Stalin nearing 70, the postwar years were dominated by a concealed struggle for the succession among his lieutenants. At the end of the war the most likely successor seemed to be
Andrei Zhdanov, party leader in
Leningrad during the war, then in charge of all cultural matters in
1946. Even during the war Beria and Zhdanov had been rivals, but after
1946 Beria formed an alliance with Malenkov to block Zhdanov's rise.
In January
1946 Beria left the post of the head of the
NKVD, while retaining general control over national security matters from his post of Deputy Prime Minister, under Stalin. The new head,
Sergei Kruglov, was not Beria's protégé. In addition, by the Summer of 1946, Beria's loyalist
Vsevolod Merkulov was replaced by
Viktor Abakumov as head of the
MGB. Kruglov and Abakumov then moved expeditiously to replace the security apparatus leadership with new people outside of Beria's inner circle, such that very soon Deputy Minister of
MVD Stepan Mamulov represented the only remnant of it outside foreign intelligence, on which Beria kept a grip. In the following months, Abakumov started carrying out important operations without consulting Beria, often working in tandem with Zhdanov, and sometimes on Stalin's direct orders. Some observers argue that these operations were aimed---initially tangentially, but with time more directly---at Beria.
One of the first such moves was the
Jewish Anti-Fascist Committee affair that commenced in October of 1946 and eventually led to the murder of
Solomon Mikhoels and the arrest of many other members. The reason this campaign had negatively reflected on Beria was that not only did he champion creation of the committee in
1942, but his own entourage included a substantial number of Jews.
Zhdanov died suddenly in August
1948, and Beria and Malenkov then moved to consolidate their power with a purge of Zhdanov's associates known as the "
Leningrad Affair". Among the more than 2,000 people executed were Zhdanov's deputy
Aleksei Kuznetsov, the economic chief
Nikolai Voznesensky, the Leningrad Party head
Pyotr Popkov and the Prime Minister of the
Russian Republic, Mikhail Rodionov. It was only after Zhdanov's death that
Nikita Khrushchev began to be considered as a possible alternative to the Beria-Malenkov axis.
Zhdanov's death did not, however, stop the anti-Semitic campaign. During the postwar years Beria supervised the establishment of Soviet-style systems of secret police, and hand-picked the leaders, in the countries of the
Eastern Europe. A substantial number of these leaders were Jews. Starting in 1948, Abakumov initiated several investigations against these leaders, which culminated with the arrest in November of 1951 of
Rudolf Slánský, Bedřich Geminder, and others in
Prague, who were generally accused of
Zionism and
cosmopolitanism, but, more specifically, of using
Czechoslovakia to funnel weapons to Israel. From Beria's standpoint, this charge was extremely explosive, because massive help to Israel was provided on his direct orders. Altogether, 14 leaders of Czechoslovakia, 11 of them Jewish, were tried, convicted, and executed in Prague (see
Prague Trials). (Similar investigations have concurrently proceeded in Poland and other Soviet satellite countries.)
Around that time, Abakumov was replaced by
Semyon Ignatiev, who further intensified the anti-Semitic campaign. On
January 13, 1953, the widest anti-semitic affair in the Soviet Union—that later came to be known as
Doctors' plot—was initiated with an article in
Pravda. A number of the country's prominent Jewish doctors were accused of poisoning top Soviet leaders and arrested. Concurrently, an hysterical anti-Semitic propaganda campaign sprang in the mass-media. Altogether, 37 doctors (17 of them were Jewish) were arrested, and MGB, on Stalin's orders, started to prepare for the deportation, or worse, of the entire Jewish population to Russia's far east.
Days after Stalin's death, Beria freed all the arrested doctors, announced that the entire matter was fabricated, and indeed arrested the MGB functionaries directly involved. The anticipated deportation of Jews never took place.
Early in the 1950s, Stalin's growing mistrust of Beria echoed in the
Mingrelian Affair in which many of Beria's protégés were purged in the
Georgian SSR, resulting in the decline of Beria's power in his native republic.