I quote Susan in my book, Sustainability Simplified. In it you'll see how much John Locke influenced my long-term vision for the US to understand and solve our environmental problems. Learning about the Thirteenth Amendment, which (mostly) banned slavery, and its improbable path to passage and ratification led me to think about solving our environmental problems similarly. I learned that many people working to abolish slavery worked hard when drafting the US Constitution to make it able to support abolitionism and to disallow property in man. Slaveholders opposed them, so they accepted compromises. Still, they put enough into the Constitution to enable weakening the institution enough to eventually end it. I wondered if sustainability might have similar precedent, like some law or phrasing of the Constitution that might have disallowed polluting or depleting. It turns out there was. It was in John Locke's Two Treatises on Government. The more I researched the man, his writings, and our Constitution, the more he seemed to apply to our environmental problems. That research led me to a paper by Susan Liebell, which I link to below. My conversation with Susan explore the application of his work and theories.