It’s probably more accurate to refer to him as the father of modern surgery, but I was thinking of William Harsted, who - alongside many other innovations (such as championing anesthetics and sterile surgical environments, both of which are alarmingly recent inventions) - created the residency system that’s still used for training hospital staff today.
He demanded insane hours of his staff, which he was easily able to handle himself due to his cocaine habit, and which have been kept to this day (a law was passed attempting to cap it at 80 hours a week, but it’s widely ignored) because studies show that shortening medical shifts results in worse patient outcomes.
It turns out minimizing shift changes is critical - the doctors/nurses who’ve been observing the patient are more aware of what’s going on and can spot any changes in behavior or subtle warning signs of danger, whereas their replacements can only go by what’s on a patient’s medical chart and what they’re told during handover.
And for a confirmed conspiracy led by a secret society of movers and shakers there’s Propaganda Due, a now-dissolved Italian Masonic lodge whose members (including future Prime Minister Silvio Berlusconi) held high positions in Italy’s government, military, intelligence agencies, religious institutions, and news industry.
Many former members still hold a great deal of power even though P2 is known to have had journalists and dissidents assassinated, supported terrorists targeting their own citizens, and were plotting a right-wing coup (one that sounds a hell of a lot like what is happening in the US, for that matter).