Syphilis (The French Pox)

A sexually transmitted disease that shaped both medicine and culture in early modern Europe.

History

Syphilis spread rapidly through Europe from the late 1400s onward. The English called it “the French Pox,” the French called it “the English Disease,” and others called it “the Neapolitan Disease” — everyone blamed a neighbor. The disease progressed in stages: initial sores, then rashes and fever, then years of apparent remission, and finally tertiary syphilis, which attacked the brain and caused madness, personality changes, and death.

Treatment

Mercury was the standard treatment for centuries — applied as ointment, taken orally, or inhaled as vapor. It was toxic and produced severe side effects (tooth loss, kidney damage, neurological problems), but it was all anyone had. The saying went: “A night with Venus, a lifetime with Mercury.”

In the novel

Jack Shaftoe’s condition is connected to the disease. Stephenson uses the progression of syphilis — particularly its neurological effects in later stages — as a force acting on Jack’s behavior and mental state.