Average human lifespan, by era:

• Neanderthal: 20 years
• Neolithic: 20 years
• Classical Greece: 28 years
• Classical Rome: 28 years
• Medieval England: 33 years
• End of 18th century: 37 years
• Early 20th century: 50 years
• Circa 1940: 65 years
• Current (in the West): 77-81 years

Today the average Zambian dies at age 37, the average Japanese at age 81.