Collapse: How Societies Choose to Fail or Succeed

by Jared Diamond

Commercial logging began in the Bitterroot Valley in 1886, to provide Ponderosa Pine logs for the mining community at Butte. The post–World War II housing boom in the U.S., and the resulting surge in demand for wood, caused timber sales on U.S. National Forest land to peak around 1972 at over six times their 1945 levels. DDT was released over forests from airplanes to control insect tree pests. In order to be able to reestablish uniform even-aged trees of chosen tree species, and thereby to maximize timber yields and increase logging efficiency, logging was carried out by clearcutting all trees rather than by selective logging of marked individual trees. Set against those big advantages of clear-cutting were some disadvantages: water temperatures in streams no longer shaded by trees rose above values optimal for fish spawning and survival; snow on unshaded bare ground melted in a quick pulse in the spring, instead of the shaded forest’s snowpack gradually melting and releasing water for irrigating ranches throughout the summer; and, in some cases, sediment runoff increased, and water quality decreased. But the most visible evil of clear-cutting, for citizens of a state who considered their land’s most valuable resource to be its beauty, was that clear-cut hillsides looked ugly, really ugly. The resulting debate became known as the Clearcut Controversy. Outraged Montana ranchers, landowners, and the general public protested. U.S. Forest Service managers made the mistake of ...

Logging