Statistics on life expectancy?

Question

if we disregard infant mortality and death in childhood's effect on the statistics, what age could people in the west expect to live 100 years ago, and 400 years ago?

Answer 1

Three score and ten (70),  as was expected in biblical times.

IN fact that number has not changed all that much in the U.S.  Life expectancy is still less than 80 even though infant and childhood mortality is much much lower than 100 years ago.

In most industrialized countries where infant and childhood mortality is lower than in the U.S. life expectancies are over 80 but not by much.