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"Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio."
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"I had found again and again that the most aberrant population of a species - often having reached species rank, and occasionally classified even as a separate genus - occurred at a peripheral location, indeed usually at the most isolated peripheral location."
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Personal Development
"Three-quarters of the world's population doesn't have enough to eat!"
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Personal Development
"The divergence of songs in the new population away from those in the progenitor population would only be prevented if these processes were balanced by repeated immigration and subsequent breeding: song flow."
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Personal Development
"In order to stabilize world population, we must eliminate 350,000 per day."
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Personal Development
"Licences to have babies incidentally is something that I got in trouble for some years ago for suggesting even in Canada that this might be necessary at some point, at least some restriction on the right to have a child."
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Personal Development
"I have just joined the Board of the Population Institute because I am convinced that early stabilization of the world's population is important for the attainment of this objective."
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Personal Development
"The optimum population is, then, less than the maximum."
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Personal Development
"Population, when unchecked, increases in a geometrical ratio."
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Personal Development
"Our population is headed for a stable plateau, which means an aging population."
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Personal Development
"We are 5 percent of the global population and consume a third of the total resources - on some level we should all feel guilty relative to the world."
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"No limits whatever are placed to the productions of the earth; they may increase forever."
Earth
"I think it will be found that experience, the true source and foundation of all knowledge, invariably confirms its truth."
Experience
"The histories of mankind are histories only of the higher classes."
Mankind
"The superior power of population cannot be checked without producing misery or vice."
Power
"The friend of the present order of things condemns all political speculations in the gross."
Friendship
"A great emigration necessarily implies unhappiness of some kind or other in the country that is deserted."
Nation
"The ordeal of virtue is to resist all temptation to evil."
Virtue
"It is an acknowledged truth in philosophy that a just theory will always be confirmed by experiment."
Truth
"Each pursues his own theory, little solicitous to correct or improve it by an attention to what is advanced by his opponents."
Attention
"In a state therefore of great equality and virtue, where pure and simple manners prevailed, the increase of the human species would evidently be much greater than any increase that has been hitherto known."
Equality
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