Wild by Law (1991)

Tells about the Wilderness Act of 1964 and the three men responsible for its passage: forester/philosopher Aldo Leopold, author of the bestselling Sand County almanac and the first to bring the word 'ecology' into standard usage; Bob Marshall, millionaire socialist and founder of the Wilderness Society; and Howard Zahniser, a bureaucrat with a love of the wild places he seldom saw. Singly and together, these three fought from the 1920s through the 1950s to preserve the natural world. Provides an overview of the roots of the environmental movement, offering a deeper understanding of one of the most important issues facing contemporary civilization.

Unfortunately the movie Wild by Law is not yet available on HBO Max.