Born that way? ‘Scientific’ racism is creeping back into our thinking. Here’s what to watch out for.

This month, Jennifer Cramblett lost her “wrongful birth” lawsuit, which centered on a troubling ideology that has been creeping into mainstream discussions in ways not seen in decades. Cramblett claimed that the sperm used to inseminate her came from the wrong donor, leading to a biracial child, which she had not wanted. Her lawsuit claimed that this mix-up in the lab caused her and her family personal injuries of various kinds.

This lawsuit was shadowed by a troubling logic: the idea that race is a biological reality with particular traits and behaviors that can be avoided through proper breeding practices. In doing so, Cramblett’s claims echoed arguments made in a darker era of global history of “scientific” racism.

Here’s how the argument goes. Some people are born with outstanding talents, easily mastering basketball, mathematics, languages or piano, if given the right environment in which to grow. What biologist or social scientist could argue with that? But alongside that genetic understanding, an old and pernicious assumption has crept back into the American conversation, in which aptitudes are...