My bet is that Mrs. Clinton took the line from the T-shirt, or rather that one of her minions did. (Speechwriter for Mrs. Clinton must currently be the saddest job in all politics.) A T-shirt is about as deep as she goes. Like Barack Obama, Mrs. Clinton likes to talk about the importance of art (or “the arts,” as such people habitually put it) and culture and the like but does not seem to have read very many serious books in the past 40 years or so, or to have thought very seriously about anything she has read. Progressives enjoy the life of the mind a great deal . . . in theory. Michael Tracey of “The Young Turks,” one of those predictable lefty types who like to go on about how much they love science and how deeply they care about the environment, took to Twitter earlier this week to ask for help in identifying an exotic bird he encountered in Texas City. It was a pelican.

Darwin, yes; Audubon, not so much.

I suppose it is just barely possible that Mrs. Clinton used “The Future Is Female” in tribute to radical feminists in the Age of Nixon, when she was first getting her real start in politics, and goodness knows that all those years of enduring marriage to Bill Clinton must fill one with a certain aspirational longing vis-à-vis the whole touchy subject of lesbian separatism. That she has been thinking about the works of Michel Houellebecq and the funny professional problem of how one would go about marketing human extinction is even more unlikely. (Though if ever there was a really convincing ad campaign for human extinction, it was Mrs. Clinton’s 2016 presidential effort.)