Eugenics
Steincke is especially known for his book The Future's Social Welfare (Danish: Fremtidens forsørgelsesvæsen) from 1920 in which he foretells:
"We treat the nonentity with all kind of care and love, but forbid him, in return, only to reproduce himself."
His book was the basis of the Danish laws about Eugenics, the sterilization and castration of unwanted elements. Steincke regarded the prevention of "non-entities" reproducing as important for society and for the "non-entity's" children.
Read more about this topic: Karl Kristian Steincke