Lysenkoism was an extension of Lamarckian evolution which was espoused by the Soviet geneticist Trofim Lysenko in the early 20th century, and an excellent example of politically-motivated deceit used to 'prove' an ideologically-based theory. Geneticists and biologists in general who disagreed with Lysenkoism lost their positions
In addition, many geneticists were imprisoned and executed for their bourgeois science, and agricultural policies based on Lysenkoism that were adopted under the Communist leaders Joseph Stalin and Mao Zedong caused famines and the death of millions.
Lysenkoism adopted Lamarck's idea of "acquired characteristics," which states that the traits an organism develops during its life are passed on to their descendants.
The theory was given enormous political support in the Soviet Union from the late 1930s until the 1950s.
Evolution, Atheism, and Communism
It was also used as proof of communist superiority over capitalism (which was ideologically tied to Darwin's survival of the fittest), as communist scientists claimed they could improve future generations through controlling and improving the present generation.