"The Sky Is Falling!"

Back in the late 1960s, when I was a callow youth with no common sense to speak of and a huge, misshapen ego, the Big Scare energizing the United Nations, the foundation world, the leaders of civil society and the intellectual establishment of the day was the Population Bomb. It's hard for young people today to understand how terrified, urgent, self righteous and utterly convinced the Population Bomb movement was. The closest analogy today is the global green movement and its apocalyptic warnings about climate change. The Population Bomb worriers didn't have as many grassroots organizations in support of their agenda as the greens do today, but the establishment, the mainstream press, and the great and the good were even more worried about the Bomb then than they are about global warming today, and the forecasts we were getting were even more dire.
http://blogs.the-american-interest.com/wrm/2013/06/27/the-demographic-blues/

The insight in the Chicken Little story was profound.