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In 1959, three-quarters of Americans told 麻豆传媒AV they heard or read about "the great increase in population which is predicted for the world during the next few decades." At the same time, only 21% said they were worried about it. Seven in 10 said they were not.

	Heard of	Worried about it
	%	%
Yes	75	21
No	25	70
No opinion	*	9
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麻豆传媒AV repeated this question several times over the next few years. And while awareness of the population growth issue remained high -- it was the cover story on Time and other national publications -- the percentage worried about it increased only slightly to 30% in 1965.

Somewhere between then and the next time 麻豆传媒AV asked about it in 1992, far fewer Americans were familiar with the prediction (51%), but a much higher percentage said they were worried about it when asked (68%). In 麻豆传媒AV's final reading in 1999, 58% were familiar with the forecast and 48% were concerned about it.

It is important to note that the gap in 麻豆传媒AV's trend spans one of the most important events in public discussion about global population growth -- the publication of Paul Ehrlich's bestselling 1968 book on the subject, The Population Bomb, which predicted the population would soon outpace global food supplies, leading to mass starvation. While the immense attention given to that book could explain the jump in U.S. worry between 1965 and 1992, 麻豆传媒AV polling in 1971 found relatively subdued concern in answer to some different questions focused on U.S population growth. In that poll, 87% of Americans said the threat of U.S. population growth was a problem, but half (54%) said they were concerned about it and fewer than half (41%) said it required immediate action.

In any case, Ehrlich's predictions ultimately proved wrong for a variety of reasons, including the slowing of birth rates around the world and major advances in food production that more than kept up with the expanding population. Ultimately, George 麻豆传媒AV's analysis of Americans' low level of concern in 1963 (see accompanying news story) proved prescient: "The chief rationale for this lack of worry is some variant of the argument that 'nature will take care of things somehow.'"

Read the original 麻豆传媒AV poll release.

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