Aldo Leopold and the Land Ethic

When Aldo Leopold arrived in Madison in nineteen twenty-four, he was already a forester and wildlife manager with two decades of experience in the Southwest, but he was not yet the thinker he would become. That transformation happened here, slowly, at the intersection of a university appointment and a worn-out piece of land.

In nineteen thirty-three, Leopold accepted the first professorship of wildlife management ever established at any American university, here at Wisconsin. He also helped guide the University of Wisconsin Arboretum, which was dedicated in nineteen thirty-four. The Arboretum's animating idea was novel: restore a piece of land to what it had been before European settlement. Tallgrass prairie. Oak savanna. The techniques Leopold and his colleagues developed at the Arboretum helped lay the groundwork for what is today called restoration ecology.

In nineteen thirty-five, he and his family began restoring a worn-out farm in Sauk County, about forty miles north of Madison along the Wisconsin River. The property had been stripped: overgrazed, eroded, the soil nearly gone. On it sat a small abandoned chicken coop that the family called the Shack. Every weekend they drove up from Madison and planted trees, restored prairie, and watched the land's recovery.

Leopold kept meticulous journals through those years. He watched a winter wren arrive. He tracked the first cranes of spring. He counted the rings on a felled oak and read the centuries backward: this ring was the year of the county fair, this ring was drought, this ring was the year the Passenger Pigeons disappeared.

Those journals became the source material for A Sand County Almanac, a collection of essays Leopold finished in April of nineteen forty-eight and submitted to Oxford University Press. It was accepted on April fourteenth. A week later, while fighting a grass fire on a neighbor's property near the Shack, Leopold died of a heart attack. He was sixty-one years old.

A Sand County Almanac was published the following year, edited by his son Luna. It introduced the concept of a land ethic: the idea that humans must extend their moral community to include soils, waters, plants, and animals. It is one of the most influential works in the history of American conservation.