Photos from the exhibit, "Influences on the United States Constitution," for the 2010 Constitution Day observance at Washington State University. Sept. 14-24, 2010. Writers, philosophers, and ideas influential to the founders include Hume, Blackstone, Descarte, Montesquieu, Machiavelli, Locke, Paine, early British documents such as the Magna Carta, the Great Law of Peace of the Iroquois Nation, state constitutions, and the Articles of Confederation.