Here is a collection of some of our favorite quotes about various aspects of population balance. We hope they can shed some light on our perspective as an organization.

Unlike plagues of the dark ages or contemporary diseases we do not understand, the modern plague of overpopulation is soluble by means we have discovered and with resources we possess. What is lacking is not sufficient knowledge of the solution but universal consciousness of the gravity of the problem and education of the billions who are its victim.
- Martin Luther King, Jr., civil rights leader and Nobel laureate
Pressures resulting from unrestrained population growth put demands on the natural world that can overwhelm any efforts to achieve a sustainable future. If we are to halt the destruction of our environment, we must accept limits to that growth.
- 1992 World Scientists' Warning to Humanity, signed by 1,600 scientists from 70 countries
It is also time to re-examine and change our individual behaviors, including our own reproduction (ideally to replacement level at most)...
- 2017 World Scientists' Warning to Humanity: A Second Notice, signed by over 20,000 scientists from 184 countries
Still increasing by roughly 80 million people per year, or more than 200,000 per day, the world population must be stabilized—and, ideally, gradually reduced—within a framework that ensures social integrity.
- 2019 World Scientists' Warning of A Climate Emergency, signed by over 13,000 scientists from 156 countries
If we don't halt population growth with justice and compassion, it will be done for us by nature, brutally and without pity- and will leave a ravaged world.
-Nobel Laureate Henry W. Kendall
What becomes of the surplus of human life? It is either, 1st. destroyed by infanticide, as among the Chinese and Lacedemonians; or 2d. it is stifled or starved, as among other nations whose population is commensurate to its food; or 3d. it is consumed by wars and endemic diseases; or 4th. it overflows, by emigration, to places where a surplus of food is attainable.
- James Madison, 1791, U.S. President
When the family is small, whatever little they have they are able to share. There is peace.
- Philip Njuguna, pastor, Nairobi, Kenya
Once it was necessary that the people should multiply and be fruitful if the race was to survive. But now to preserve the race it is necessary that people hold back the power of propagation.
- Helen Keller, world-renowned deaf and blind author and lecturer
Can you think of any problem in any area of human endeavor on any scale, from microscopic to global, whose long-term solution is in any demonstrable way aided, assisted, or advanced by further increases in population, locally, nationally, or globally?
- Albert A. Bartlett, Professor of Physics, University of Colorado; World Population Balance Advisor
The key probem facing humanity in the coming century is how to bring a better quality of life -- for 8 billion or more people -- without wrecking the environment entirely in the attempt.
- Edward O. Wilson, scientist, Pulitzer prize winning author and father of biodiversity
It is not prudent to rely on science and technology alone to solve problems created by rapid population growth, wasteful resource consumption and harmful human practices.
- U.S. National Academy of Sciences and Royal Society of London, joint statement
If the world is to save any part of its resources for the future, it must reduce not only consumption but the number of consumers.
- B.F. Skinner, psychologist and author (Introduction to Walden Two, 1976 edition)
'Smart growth' destroys the environment. 'Dumb growth' destroys the environment. The only difference is that 'smart growth' does it with good taste. It's like booking passage on the Titanic. Whether you go first-class or steerage, the result is the same.
- Albert A. Bartlett, Professor of Physics, University of Colorado; World Population Balance Advisor
We must stabilize population. This will be possible only if all nations recognize that it requires improved social and economic conditions, and the adoption of effective, voluntary family planning.
- Lester Milbrath, professor emeritus and author, Learning to Think Environmentally (While there is Still Time)
The point of population stabilization is to reduce or minimize misery.
- Roger Bengston, founding board member, World Population Balance
Which is the greater danger - nuclear warfare or the population explosion? The latter absolutely! To bring about nuclear war, someone has to DO something; someone has to press a button. To bring about destruction by overcrowding, mass starvation, anarchy, the destruction of our most cherished values-there is no need to do anything. We need only do nothing except what comes naturally - and breed. And how easy it is to do nothing.
- Isaac Asimov, biochemist and science writer (in this 1966 interview he predicted that world population would reach 6 billion around 2000. Most leaders dismissed his prediction as outrageous. Population passed 6 billion in 1999.)
We are in a bottleneck of overpopulation and wasteful consumption that could push half of Earth’s species to extinction in this century.
- Edward O. Wilson, scientist, Pulitzer prize winning author and father of biodiversity
There’s no point bleating about the future of pandas, polar bears and tigers when we’re not addressing the one single factor that’s putting more pressure on the ecosystem than any other — namely the ever-increasing size of the world’s population.
- Chris Packham, naturalist
Anyone who believes exponential growth can go on forever in a finite world is either a madman or an economist.
- Kenneth E. Boulding, economist, educator, peace activist, and interdisciplinary philosopher
The greatest shortcoming of the human race is our inability to understand the exponential function.
- Albert A. Bartlett, Professor of Physics, University of Colorado; Former World Population Balance Advisor

No matter what your cause, it is a lost cause without sustainable population.