When not protected by law, by popular favor or superstition, or by other special circumstances, [birds] yield very readily to the influences of civilization, and, though the first operations of the settler are favorable to the increase of many species, the great extension of rural and of mechanical industry is, in a variety of ways, destructive even to tribes not directly warred upon by man.
George Perkins MarshMan is everywhere a disturbing agent. Wherever he plants his foot, the harmonies of nature are turned to discords.
George Perkins MarshThe improvement of forest trees is the work of centuries. So much more the reason for beginning now.
George Perkins MarshMan has too long forgotten that the earth was given to him for usufruct alone, not for consumption, still less for profligate waste.
George Perkins Marsh