Quote by CK-12 Foundation

Population, when unchecked, increases in a geometrical ratio.

— Thomas Malthus

The optimum population is, then, less than the maximum.

— Garrett Hardin

All I claimed was that when a drastic change occurs, it occurs in a relatively small and isolated population.

— Ernst Mayr

“Our recent divergence from a small population explains another important fact, one that every human ought to know: we are a genetically homogenous species.”

— Daniel E. Lieberman

“I believe that the emphasis on curbing population growth diverts attention from the more vital issue of pursuing policies that allow the population to…

— Muhammad Yunus

The population explosion is an ecological phenomenon of displacement. Unless we solve that ecological problem of displacing people - to build huge dams, to…

— Vandana Shiva

“Growth in the number of humans is associated with decline in humanity.”

— Meeta Ahluwalia

Real problem is not population explosion, but what the population is doing.

— Radhanath Swami

The key thing you can do to reduce population growth is actually improve health.

— Bill Gates

I would be remiss, as a scientist who studied this, if I didn't mention the following two things: The first is that, most importantly,…

— John Miller

Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio.

— Thomas Malthus

“Our statistics are at fault: the population has been returned too large. How many men are there to a square thousand miles in this…

— Henry David Thoreau