- Is the Human Species Special? Why Human-Induced Global Warming Could Be in the Interests of Life
- An Evolutionary Perspective on the Relationship Between Humans and Their Surroundings: Geoengineering, the Purpose of Life & the Nature of the Univer
- How Much of Man Is Natural?: Two Versions of the International Prize-Winning Essay
- Saviours or Destroyers: The Relationship Between the Human Species and the Rest of Life on Earth
- What Does It Mean to Be 'Green'?: Sustainability, Respect & Spirituality









