Ignaz Semmelweis 1818–1865 Ignaz Semmelweis 1818–1865 Medical students and midwives work in both clinics 20 Maternal mortality rate (%) Med students only 15 Handwashing mandated Semmelweis fired 10 5 0 First clinic Second clinic Midwives only Year Why was Semmelweis not believed? A grand conflict between Empiricism (modern!) and medieval, pre-scientific beliefs? Politics Institutions Class Culture