The Story of the U.S. Forest Service
The early Forest Service established a policy of full fire suppression in the national forests, because fire destroys valuable lumber."
Incomplete knowledge, both of the effects of fire suppression and of the optimal harvest yield for sustainability, led the U.S. Forest Service to allow lumber companies to harvest significantly more trees than was healthy for the forests.
Over-harvesting contributed to a decline in forest health.
Today, the U.S. Forest Service has moved away from Sustainable-Yield Forestry, which wasn't as sustainable as hoped, in favor of Adaptive Ecosystem Management.