A Broad Look at Future Worlds

Which World? Scenarios for the 21st Century . By Allen Hammond . Island Press, Washington, DC, 1998. 320 pp. $24.95. ISBN 1-55963-575-4. Rather than try to predict the future, Hammond presents three scenarios for humanity in the coming century and explores their implications. He hopes to stimulate further thought and action, so that we can shape a sustainable world.