Commentary To a hammer, everything looks like a nail; to a modern ideologist, every difference looks like the result of prejudice. This ideology reminds me of the tiny ants that have got into my kitchen in my house in the French countryside. They get everywhere, including (this morning) into my computer. The ideology is like that: it gets everywhere and leaves nothing alone. It is, like the ants, very annoying. An article on the website of the Journal of the American Medical Association, published on July 2, examined the rate at which scientific articles published between 2015 and 2018 in five of the world’s most important medical journals—the Annals of Internal Medicine, the British Medical Journal, the Journal of the American Medical Association, JAMA Internal Medicine and the New England Journal of Medicine—were cited by other workers, according to whether the first or senior authors of the articles were men …