> No one individual is billions, millions, or probably even thousands of times more productive than any other able-bodied individual. That isn't correct. Compa

> No one individual is billions, millions, or probably even thousands of times more productive than any other able-bodied individual. That isn't correct. Compare Einstein to an able-bodied laborer. How long will it take the laborer to figure out relativity, assuming an infinite lifetime? Being "able-bodied" isn't much of a consideration in modern times, and in the future, when robots do all the manual labor, it will become completely irrelevant. Not to say we won't exercise for health and enjoyment, only that we won't dig ditches.