Nearly every major topic of ecological and ethical substance is touched upon in this finely tuned debate by very serious and compassionate scientists and humanists. This unique project shows how scientists approach the great ethical problems of our time without the jargon and complexity that can intimidate some readers. Their audience includes all readers concerned about saving the environment, the treatment of animals, and the fate of the planet for future generations. It s a powerful and ultimately positive book which in its brevity has something in to surprise, provoke and inspire nearly everyone.Though Ehrlich and Tobias come from the same ethical space, ecologically-speaking, there are marked differences in their approaches and data sets; differing moral positions and heated stances that set their worldviews sufficiently apart to make for fascinating and insightful points that are accessible to the general reader."