Dr. Alice Hamilton is the mother of industrial medicine in the USA. She was the first expert on the dangerous lead trades, plus she studied many toxic hazards like mercury, arsenic, and weapons of war. In a span of 40 years, she wrote over 80 scientific articles. She influenced factory bosses as well as Presidents and policymakers to make the workplace safer. Her pace slowed only in old age -- she died at 101 years, three months before the Occupational Safety and Health Act (OSHA) was enacted in 1970.