"Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio."
"The environment is everything that isn't me."Thomas Malthus on Albert Einstein
"Never doubt that a small group of thoughtful, committed citizens can change the world indeed, it's the only thing that ever has."Thomas Malthus on Margaret Mead
"Keep close to Nature's heart... and break clear away, once in awhile, and climb a mountain or spend a week in the woods. Wash your spirit clean."Thomas Malthus on John Muir
"Thank God men cannot fly, and lay waste the sky as well as the earth."Thomas Malthus on Henry David Thoreau
"God has cared for these trees, saved them from drought, disease, avalanches, and a thousand tempests and floods. But he cannot save them from fools."Thomas Malthus on John Muir
"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."
"I do not know that any writer has supposed that on this earth man will ultimately be able to live without food."
"I think it will be found that experience, the true source and foundation of all knowledge, invariably confirms its truth."
"The superior power of population cannot be checked without producing misery or vice."
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