Hope On Earth
By Dr. Paul R. Ehrlich, Stanford University Bing Professor of Population Studies; and Dr. Michael Charles Tobias, President of Dancing Star Foundation.

This book examines the relationship between human nature and the rest of biodiversity, encompassing scientific and philosophical components of the environmental crises and challenges facing our species. Animal rights, global ecological conservation, human consumption and a vast array of historic and contemporary economic and geopolitical scenarios are explored with the goal of better understanding and articulating the serious dilemmas confronting our kind and all of the tens-of-millions of other species with which humans co-habit this Earth.

http://press.uchicago.edu/ucp/books/book/chicago/H/bo17588109.html