Sasha Shen Johfre

We are living in the most age-diverse society in human history. At the turn of the last century, almost half (44 percent) of the United States population was under 20 years old, and only about one in 20 (6 percent) was over age 60. The age distribution of the population in 1900 was shaped like a triangle — there were many more younger than older people, and every chronological age had fewer people than the one before it.

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