In 1930 he became the head of the Genetics Division of the Institute and in the same year, he was nominated by the Government along with Izrail Agol to train in the United States of America under H.J.
Muller along with Agol and Levit, took an interest in positive eugenics and included a chapter on the idea in his book Out of the Night (1935) and sent a copy of it to Stalin.
By the time he returned to the Soviet Union in 1932 his post had been abolished but he was made a director of a newly created Maxim Gorky Biomedical Research Institute.
The communist party met in November 1936 and denounced Levit and Agol as promoters of fascist ideas.
At the international meeting of geneticists in Moscow, Muller was an invited speaker and there was considerable debate on eugenics.