For someone who ardently believed in witches and sea monsters, the puritan firebrand Cotton Mather was a surprising advocate for advanced medical science.
When some sailors brought smallpox to Boston in 1721, Mather forcefully promoted a new and dubious-sounding preventative, called “inoculation.”
He had first heard about the procedure from one of his African slaves.
The process involved smearing puss from the corpuscles of infected people into wounds deliberately cut into healthy people. Understandably, lots of 18th Century Bostonians thought this idea was nuts.