Historical Developments in Unit 9.2 - Technological Advances: Debates About the Environment After 1900

• Diseases, as well as medical and scientific developments, had significant effects on populations around the world.

• Diseases associated with poverty persisted while other diseases emerged as new epidemics and threats to human populations, in some cases leading to social disruption. These outbreaks spurred technological and medical advances. Some diseases occurred at higher incidence merely because of increased longevity.

Additional Resources 9.2