In 1775, a year before the Declaration of Independence was signed, a Harvard professor named Edward Wigglesworth did the math ...

Rising population growth should slow in the coming decades and see a decline in the second half of the century.

As birth rates fall below replacement levels across much of the world, concerns are shifting from overpopulation to the economic and social consequences of aging and shrinking populations. Credit: ...

Global fertility has plunged to record lows, shifting attention from overpopulation to a potential shortage of workers, taxpayers and innovators. Shibuya Crossing in Tokyo, Japan. The country’s ...