> It's quite easy to come up with examples where the official progressive position is nonscientific; Lysenkoism, for example, is as popular in left-leaning politics as ever (in the context of human biology).

You believe the left believes children of parents with amputated arms will be born with amputated arms, that genes don't exist, that any species can be changed into any other species at the genetic level by manipulating only environmental conditions, and that random mutations do not occur?

Who do you think believes this? Name specific people who aren't irrelevant.

Lysenkoism persisted in the Soviet Union because people who pointed out the inconsistencies too straightforwardly would find themselves in hot water. Anyone who wanted to discuss the issue had to approach it somewhat obliquely. Most people were unable to comprehend this discourse - a necessary precondition to avoid trouble.

You could try looking very closely at your middle paragraph and looking for analogies with contemporary bio-politics.