U.S. Supreme Court Justice William O. Douglas was a giant in the legal world, even if he is often remembered for his four wives, as a potential vice-presidential nominee, as a target of impeachment proceedings, and for his tenure as the longest-serving justice from 1939 to 1975. His most enduring legacy, however, is perhaps his advocacy for the environment.

Douglas was the spiritual heir to early twentieth-century conservation pioneers such as Teddy Roosevelt and John Muir. His personal spiritual mantra embraced nature as a place of solitude, sanctuary, and refuge. Caught in the giant expansion of America's urban and transportation infrastructure after World War II, Douglas became a powerful leader in forging the ambitious goals of today's environmental movement. And, in doing so, Douglas became a true citizen justice.

In a way unthinkable today, Douglas ran a one-man lobby shop from his chambers at the U.S. Supreme Court, bringing him admiration from allies in conservation groups but raising ethical issues with his colleagues. He became a national figure through his books, articles, and speeches warning against environmental dangers. Douglas organized protest hikes to leverage his position as a national icon, he lobbied politicians and policymakers privately about everything from logging to highway construction and pollution, and he protested at the Supreme Court through his voluminous and passionate dissents.

Douglas made a lasting contribution to both the physical environment and environmental law--with trees still standing, dams unbuilt, and beaches protected as a result of his work. His merged roles as citizen advocate and justice also put him squarely in the center of ethical dilemmas that he never fully resolved. M. Margaret McKeown's Citizen Justice: The Environmental Legacy of William O. Douglas (Potomac Books, 2022) elucidates the why and how of these tensions and their contemporary lessons against the backdrop of Douglas's unparalleled commitment to the environment.

William Domnarski is a longtime lawyer who before and during has been a literary guy, with a Ph.D. in English. He's written five books on judges, lawyers, and courts, two with Oxford, one with Illinois, one with Michigan, and one with the American Bar Association.

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