Anarchism

If you read the article, there is an allusion to there being a book on the subject, but the only direct evidence presented is that quote from Kim Jong-Il, so I tried googling it and the result is basically three other sites plagiarizing the article and nothing else. If you are wondering, I placed the quotes on the second clause only because of the spelling of "homogenous" being variable, as you'll notice from the suggested search.

So basically "there's a book about it" is what is left of the claim. I do also find the history a bit weird since Koreans were treated as chattel by Imperial Japan and to this day the more reactionary parts of Japanese culture regards them as a foreign and inferior race, while mainstream Japan glosses over how much of Japan's population is ethnically Korean to make its own claims of homogeneity.

Do I need to try to dig up a digital copy of that book?

Edit: full disclosure, Trotsky supporting eugenics is a pretty obscure thing, I mostly just mentioned it as a dig at him. I doubt it really influenced the New Soviet Man perception even though he basically did assert that if America went socialist, there would be a New Socialist Man within 100 years that would actually be the product of eugenics, unlike in the Soviet case.