The greatest folly is to accept expert statements uncritically. At the very least, we should always seek another opinion.

What features of your daily life do you expect to be improved by a further increase in population?

Why are ecologists and environmentalists so feared and hated? This is because in part what they have to say is new to the general public, and the new is always alarming.

Ecological differentiation is the necessary condition for coexistence.

The only kind of coercion I recommend is mutual coercion, mutually agreed upon by the majority of the people affected.

You cannot do only one thing.

It is a mistake to think that we can control the breeding of mankind in the long run by an appeal to conscience.