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Qualitative Growth, coauthored with Hazel Henderson (September 2009)

Where Have All the Flowers Gone? Reflections on the Spirit and Legacy
of the Sixties (12/1/02)

The Roots of Terrorism: Reflections on September 11, One Year Later (9/5/02)

Trying to Understand: A Systemic Analysis of International Terrorism (10/5/01)