George Perkins Marsh gave a speech to the Agricultural Society of Rutland County, Vermont. He called attention to the destructive impact of human activity on the land, especially through deforestation. He advocated a conservationist approach to the management of forested lands. The speech was published in 1847. It became the basis for his book Man and Nature or The Earth as Modified by Human Action, first published in 1864 and reprinted many times thereafter.