An old soc.history.what-if post of mine (with an URL updated):
***
See the article by David Holloway in the November/December 1994 issue of
the *Bulletin of the Atomic Scientists*: "How the Bomb Saved Soviet
Physics"
https://books.google.com/books?id=wAwAAAAAMBAJ&pg=PA46
Holloway discusses the conflict between the Academy physicists and the
"Marxist philosophers" who got support from a group of mostly mediocre
Moscow University physicists:
"One by one members of Mandelshtam's school--Grigorii S. Landsberg, Igor
Tamm, S. E. Khaikin, and Leontovich--left the university, which was taken
over by a varied group of mediocre physicists. The group included some
serious physicists such as Dmitri Ivanenko and Aleksandr S. Predvoditelev,
but also men like V. M. Kessenikh and V. F. Nozdrev, who made up for their
lack of ability in physics with ideological vigilance. [41]
"What united the university physicists was the belief that their work had
not received the recognition they thought it deserved. They were also
annoyed that, in spite of strenuous efforts, they had not been drawn into
the atomic project. Some of them were willing to resort to political
charges to settle scores with the Academy physicists. The campaign against
cosmopolitanism provided political cover for their accusations. [42]...
"...The university physicists and their philosopher allies went on the
attack, accusing the Academy physicists of spreading cosmopolitanism and
idealism, of not citing Russian scientists, of avoiding honest arguments,
of refusing to develop fundamental physics, and of spying for Germany.
"This last charge was leveled against Mandelshtam, who had died five years
earlier. But living physicists were also criticized. Ioffe, Tamm, and
Markov, all of whom took part in the committee meetings, were severely
criticized. Iakov Frenkel was a particular target, and his 1931 position
on the irrelevance of dialectical materialism to physics was brought up
against him. The absent Kapitsa was also attacked. [43]"
https://books.google.com/books?id=wAwAAAAAMBAJ&pg=PA53
Fortunately for Soviet physics, the proposed conference on physics was
never held. "It is hard to say what effect the conference might have had
on Soviet physics. The draft resolution did not condemn quantum mechanics
and relativity theory as such, so the conference might not have been as
devastating to physics as the August 1948 meeting was to biology. But it
would have strengthened the position of the Moscow university physicists
who, as a group, were narrow-minded, chauvinistic, and less able than the
Academy physicists. Physics would have been drawn further into the realm
of ideology, and disagreements and disputes would have been conducted more
frequently in the language of Stalinist politics. The role of the philosophers as
ideological policemen would have been strengthened. All this would have
created a dangerous situation for Soviet physics.
"The conference failed to take place, however, and its possible effects
must remain a matter of speculation. The last meeting of the organizing
committee took place on March 16, 1949, and the conference was due to
start on March 21. It was canceled between those two dates. Only Stalin
could have taken this decision, and it appears that he canceled the
conference because it might retard the atomic project.
"According to Gen. V.A. Makhnev, head of the secretariat of the Special
Committee on the Atomic Bomb, Beria asked Kurchatov whether it was true
that quantum mechanics and relativity theory were idealist, in the sense
of antimaterialist. Kurchatov replied that if relativity theory and
quantum mechanics were rejected, the bomb would have to be rejected too.
Beria was worried by this reply, and may have asked Stalin to call off the
conference. [45]
"A more circumstantial account, which does not contradict Makhnev's story,
was given by Artsimovich, on the basis of a conversation with Beria after
Stalin's death. According to Artsimovich, three leading physicists--
Kurchatov may have been among them--approached Beria in mid-March 1949 and
asked him to call off the conference on the grounds that it would harm
Soviet physics and interfere with the atomic project. Beria replied that
he could not make a decision on this himself, but that he would speak to
Stalin. Stalin agreed to cancel the conference, saying of the physicists,
according to Beria, 'Leave them in peace. We can always shoot them
later.'...