By Harry S. Margolis
For better or worse, the world is getting older. In 1950, the median age in the United States was 30 and in Europe, 29. Today, it's 39 and 43, respectively. In the United States, it actually dropped a bit for two decades, with the baby boom, reaching a low of 28 in 1970, before increasing again.
The aging of the world population can be explained by a mixture of longer life expectancies, lower birth rates, and lower child mortality. As borne out in the following chart, these factors have affected the median age in all the world except for Africa.Read More