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Distinguished Science Lecture Series Archives

The Medea Hypothesis

Peter Ward

Is Life on Earth Ultimately Self-Destructive?

In The Medea Hypothesis, renowned paleontologist Dr. Peter Ward proposes a revolutionary and provocative vision of life’s relationship with the Earth’s biosphere, one that has frightening implications for our future — yet also offers hope. Using the latest discoveries from the geological record, he argues that life might be its own worst enemy. This stands in stark contrast to James Lovelock’s Gaia hypothesis — the idea that life sustains habitable conditions on earth. In answer to Gaia, which draws on the idea of the “good mother” who nurtures life, Ward invokes Medea, the mythical mother who killed her own children. Could life by its very nature threaten its own existence? Ward demonstrates that all but one of the mass extinctions that have struck Earth were caused by life itself. He looks at our planet’s history in a new way, revealing an Earth that is witnessing an alarming decline of diversity and biomass — a decline brought on by life’s own “biocidal” tendencies. And the Medea hypothesis applies not just to our planet — its dire prognosis extends to all potential life in the universe. Breathtaking in scope, The Medea Hypothesis is certain to arouse fierce debate and radically transform our worldview.

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