Dates	Events
30,000 BP - 1500	Settlement of North America
1492- 1650	European Exploration of North America
1580	Spanish Settlement of Southwest
1585 - 1590	John White's depictions of Roanoke/Indians
1607	English Settlement of Chesapeake Bay area
1620	English Settlement of Massachusetts Bay area
1691	Broad Arrow Policy
1705	Robert Beverley's History and Present State of Virginia
1760 - 1820	Soil Conservation Experiments in Virginia
1773	Phillis Wheatley's poems about nature
1775-1783	The American Revolution
1776	Declaration of Independence
1785	General [Land] Ordinance of 1785
1787	Thomas Jefferson's Notes of the State of Virginia; Agrarian Ideal
1803	Louisiana Purchase
1804-1806	Lewis and Clark Expedition
1808 - 1834	John James Audubon's Depictions of birds and life in United States
1812-1815	The War of 1812
1836 - 1849	Hudson River School of painters
1838	Frances Anne Kemble's Journal of a Residence on a Georgian Plantation in 1838 -1839.
1844	George Catlin's paintings of American Indians and nature in the Great Plains
1846	Thomas Hart Benton's "Manifest Destiny"
1849	California Gold Rush
1854	Thoreau's Walden
1861-1865	The Civil War
1862	Homestead Act
1862	Morrill Land Grant Act
1873	Isabella Bird's A Lady's Life in the Rockies
1878	John Wesley Powell's Report on the Arid Lands of the United States
1892	Founding of the Sierra Club
1892	Ellen Swallow introduces the term "Oekology" to America
1893	Frederick Jackson Turner's "Significance of the Frontier in American History."
1897	Louis Hughes' Thirty Years a Slave
1900 - 1913	Progressive Conservation Movement
1902	Reclamation Act
1902	Bernhard Fernow's Economics of Forestry
1908	Theodore Roosevelt's Conference of Governor's
1909 -1913	National Conservation Congresses
1910	Jane Addams' Twenty Years at Hull-House
1914-1918	World War I
1916	Frederic Clements' Plant Succession
1929-1938	The Great Depression and the New Deal
1933	Robert Marshall's The People's Forests
1935	Founding of the Wilderness Society
1936 - 1945	New Deal Conservation
1937	Founding of the Civilian Conservation Corps
1941-1945	World War II
1946	Creation of Bureau of Land Mangement
1949	Aldo Leopold's A Sand County Almanac
1962	Rachel Carson's Silent Spring
1968	Paul Ehrlich's The Population Bomb
1969	The National Environmental Policy Act
1970	Earth Day/Environmental Movement
1980	The Alaska National Interests Lands Act
1992	The Earth Summit