what was life expectancy in 1840s
âLife expectancy worldwide has been rising pretty steadily since 1840, at a rate of about two years per decade,â Daniel Perry, who is executive director of the Alliance for Aging Research, tells WebMD. âIn 1840, the longest-living people in the world were women in Sweden, and they lived an average of 45 years.â.he biggest single factor in the increase in life expectancy during the latter half of the 20th century and beyond has been the improvement in the prevention, diagnosis, and treatment of cardiovascular disease, the experts agree.