Putting childhood mortality into the average brings down the average considerably. If you made it to your teen years, you could expect a reasonably long natural life.
Thomas Paine lived to 72, Washington to 67, Ben Franklin 84, Jefferson 83, John Adams 90.
According to the National Center for Health Statistics, life expectancy for men in 1907 was 45.6 years; by 1957 it rose to 66.4; in 2007 it reached 75.5. Unlike the most recent increase in life expectancy (which was attributable largely to a decline in half of the leading causes of death including heart disease, homicide, and influenza), the increase in life expectancy between 1907 and 2007 was largely due to a decreasing infant mortality rate, which was 9.99 percent in 1907; 2.63 percent in 1957; and 0.68 percent in 2007.
I think heaven has many more people than most believe, even christians. For I believe that all who die before the age of consent go staight to the LORD.