==Sorry but that turns out to not be the case. Lysenko still sat high in the party for nine years after Stalin. From 1930 to 1962 he enforced his view of inheritance with the force of the State. Darwin was not on the wane during that time and Lamarck was quite discredited by Weisman’s (1834-1914) study in mice; at least to those without Communist ideological motivation to deny that selective advantage has its advantages.
True, Lysenko did sit high in the party after Stalin’s death. But Lysenkoism was indeed waived in the 1960s. Lysenko came in at the tail end of what was known as the “eclipse of Darwinism.” This lasted from the 1870s to the 1930s, and it was a time when Lamarck was favored my many evolutionary scientists. Thus, the founders of modern Communism (Marx, Lenin, etc) were Darwinians, then there was a switch to Lamarck/Lysenko under Stalin (at the tail end of while Lamarck was still in vogue), and then a switch back to Darwin in the 1960s.