At the heart of the U.S. conservative movement, and most religious conservative movements, is a reproductive agenda. Old-style religious meddling in reproduction had a strong “make more of us” character to it– resulting in blanket policies designed to encourage reproduction across a society– but the later incarnations of right-wing authoritarianism, especially as they have mostly divorced themselves from religion, have been oriented more strongly toward goals judged to be eugenic, or to favor the reproduction of desirable individuals and genes; instead of a broad-based “make more of us” tribalism, it becomes an attempt to control the selection process.
The term eugenics has an ugly reputation, much earned through history, but let me offer a neutral definition of the term. Eugenics (“good genes”) is the idea that we should consciously control the genetic component of what humans are born into the world. It is not a science, since the definition of eu- is intensely subjective. As “eugenics” has been used throughout history to justify blatant racism and murder, the very concept has a negative reputation. That said, strong arguments can be made in favor of certain mild, elective forms of eugenics. For example, subsidized or free higher education is (although there are other intents behind it) a socially acceptable positive eugenic program: removal of one of a dysgenic economic force (education costs, usually borne by parents) that, empirically speaking, massively reduces fertility among the most capable people while having no effect on the least capable.