How Did Early Humans First Die from Illness?

Early humans in the Paleolithic era faced a very different disease landscape than we do today.

Primary Causes of Death

• Infectious diseases caused approximately 75% of deaths in early human populations.
• Without antibiotics or modern medicine, common bacterial infections — wounds, respiratory infections, and gastrointestinal diseases — were frequently fatal.
• Parasitic infections from contaminated water and food were also major killers.
• Zoonotic diseases (transmitted from animals) were common, as early humans lived in close proximity to wildlife during hunting.

Conclusion

Early humans died from illness mainly because of infections: bacteria, parasites, and zoonotic pathogens, with no antibiotics or modern care. Infectious disease was the dominant cause of death until the rise of sanitation, vaccines, and medicine.