You cannot do only one thing.
A finite world can support only a finite population; therefore, population growth must eventually equal zero.
There is nothing more dangerous than a shallow thinking compassionate person
Ecological differentiation is the necessary condition for coexistence.
Every plausible policy must be followed by the question 'And then what?'
Economists (and others) who are satisfied with nature-free equations develop a dangerous hubris about the potency of our species