We have to shift our emphasis from economic efficiency and materialism towards a sustainable quality of life and to healing of our society, of our people and our ecological systems. – Janet Holmes à Court

To waste, to destroy our natural resources, to skin and exhaust the land instead of using it so as to increase its usefulness, will result in undermining in the days of our children the very prosperity which we ought by right to hand down to them amplified and developed. – Theodore Roosevelt, seventh annual message, 3 December 1907

The human race will be the cancer of the planet. – Julian Huxley, attributed

The command “Be fruitful and multiply” was promulgated, according to our authorities, when the population of the world consisted of two people. – William Ralph Inge, More Lay Thoughts of a Dean, 1931