What the great moment in the Ether Dome really marked was something less tangible but far more significant: a huge cultural shift in the idea of pain. Operating under anesthetic would transform medicine, dramatically expanding the scope of what doctors were able to accomplish. What needed to change first wasn’t the technology - that was long since established - but medicine’s readiness to use it.

Before 1846, the vast majority of religious and medical opinion held that pain was inseparable from sensation in general, and thus from life itself. Though the idea of pain as necessary may seem primitive and brutal to us today, it lingers in certain corners of healthcare, such as obstetrics and childbirth, where epidurals and caesarean sections still carry the taint of moral opprobrium. In the early 19th century, doctors interested in the pain-relieving properties of ether and nitrous oxide were characterized as cranks and profiteers. The case against them was not merely practical, but moral: They were seen as seeking to exploit their patients’ base and cowardly instincts. Furthermore, by whipping up the fear of operations, they were frightening others away from surgery and damaging public health.

The “eureka moment” of anesthesia, like the seemingly sudden arrival of many new technologies, was not so much a moment of discovery as a moment of recognition: a tipping point when society decided that old attitudes needed to be overthrown. It was a social revolution as much as a medical one: a crucial breakthrough not only for modern medicine, but for modernity itself. It required not simply new science, but a radical change in how we saw ourselves.

“One of the most impressive features of being a student is how aware you are of a twenty-four-hour work cycle. When you conceive of what you have to do for school, it’s not in terms of nine to five but in terms of what you can physically do in a week while still achieving a variety of goals in a variety of realms—social, romantic, sexual, extracurricular, résumé-building, academic commitments.” Alex was eager to dispel the notion that students who took Adderall were “academic automatons who are using it in order to be first in their class, or in order to be an obvious admit to law school or the first accepted at a consulting firm.” In fact, he said, “it’s often people”—mainly guys—“who are looking in some way to compensate for activities that are detrimental to their performance.” He explained, “At Harvard, at least, most people are to some degree realistic about it. . . . I don’t think people who take Adderall are aiming to be the top person in the class. I think they’re aiming to be among the best. Or maybe not even among the best. At the most basic level, they aim to do better than they would have otherwise.”