Agol and Levit returned to the Soviet Union and found themselves in opposition to Trofim Lysenko. Agol was arrested on May 27, 1936 on charges of sabotage. The American scientist
C. B. Davenport addressed a letter to the US Secretary of State in December 1936 concerning the arrest of Agol,
Nikolai Vavilov, and Levit, in which he wrote: As a geneticist, I strongly protest against the actions of the Soviet government against my colleagues Levit, Agol and Vavilov. These scientists own research of the highest level, and it is thanks to their scientific activity that the world community of geneticists informs them about their achievements in genetics. The three scientists in question have significantly increased our knowledge of genetics, while bringing great benefits to the USSR. — Legacy: documents, publications. Yu.I. Vavilov, Doctor of Physical and Mathematical Sciences. Agol was shot as a
Trotskyist on March 8, 1937. The Supreme Court of the USSR rehabilitated him on May 25, 1957. A son,
Vadim, became a molecular biologist and virologist. == Works ==