1869 John Muir moved to Yosemite Valley.
1876 Appalachian Mountain Club founded
1866 The word “ecology” was coined by the German biologist Ernst Haeckel.
1864 Congress passed legislation giving Yosemite Valley to the state of California as a park.
1864 Posthumous publication of Henry David Thoreau’s The Maine Woods, in which Thoreau called for the establishment of “national preserves” of virgin forest.