A young forester shoots a wolf, walks up to the dying animal, and watches a 'fierce green fire' fade in her eyes. In that single quiet moment on a mountain in the American Southwest, his entire worldview fractures, and the modern science of wildlife management is born.

This episode traces the radical evolution of Aldo Leopold, from a man trained to dominate nature as a resource to the philosopher who taught us we are plain citizens of the land, not its conquerors. We follow his grueling journey through trial, error, and the devastating consequences of his own predator-control policies to the birth of his land ethic.

• How the progressive era treated forests like factories, with predators as 'machine errors' to be eliminated
• The trophic cascade he witnessed: kill the wolves, the deer explode, and the mountain itself washes a ...