Welcome! I'm a philosophy professor at Colorado State University in Fort Collins, Colorado. My research and writing center on virtue ethics and environmental ethics, with a special interest in preserving wild nature. I'm the author of How Many Is Too Many? The Progressive Argument for Reducing Immigration into the United States, published by University of Chicago Press, and author of Thoreau's Living Ethics: Walden and the Pursuit of Virtue and co-editor of the anthology Life on the Brink: Environmentalists Confront Overpopulationboth published by University of Georgia Press. I am an affiliated faculty member of CSU’s School of Global Environmental Sustainability and immediate past president of the International Society for Environmental Ethics. I live in Fort Collins with my wife Kris and sons Henry and Tom.

* When How Many Is Too Many? first came out, I did dozens of interviews promoting the book. But recently I discussed the book with Maria Stadtmueller on her podcast The Big Chew and it was far and away the best discussion I’ve had on immigration and environmental issues in a public forum. Check it out!

* Good news! Swedish ecologist Frank Gotmark and I have been awarded a $600,000 grant to study the environmental effects of overpopulation and the best means to reduce future population growth, globally and nationally. The two-year project is funded by the Global Challenges Foundation. Stay tuned for future research results.