- On the Evolution of Intimacy: A Brief Exploration into the Past, Present, and Future of Gender and Love
- Hope and the Future: An Introduction to the Concept of Cultural Maturity
- Necessary Wisdom: Meeting the Challenge of a New Cultural Maturity
- Quick and Dirty Answers to the Biggest of Questions: Creative Systems Theory Explains What It Is All About (Really)
- The Creative Imperative : Human Growth and Planetary Evolution