Paul R. Ehrlich

The Dominant Animal: Human Evolution and the Environment

By Paul R. Ehrlich, Anne H. Ehrlich

Humanity on a Tightrope: Thoughts on Empathy, Family, and Big Changes for a Viable Future

By Paul R. Ehrlich, Stanford University, Robert E. Ornstein

Ecoscience: Population, Resources, Environment

By Paul R. Ehrlich, etc., et al.

The Machinery of Nature

By Paul R. Ehrlich

Population, Resources, Environment: Issues in Human Ecology

By Paul R. Ehrlich, Anne H. Ehrlich