"Life expectancy at birth takes account of infant mortality"
Era Life expectancy at birth in years
Pre-Columbian Southern United States 25–30
Paleolithic 33
Neolithic 20 to 33
Medieval Islamic world 35+
Late medieval English peerage 30
Early modern England[19] 33–40 34 years for males in the 18th century.[33]
Early 19th-century England 40
Classical Rome 20 to 30
Classical Greece 25to 28
Bronze Age and Iron Age 26
2017 world average 72.2
1950 world average 48
1900 world average 31