Germans died in British service in addition to 4,888 deserters; of the former, it is estimated 1,800 were killed in combat. Legacy The American Revolution established the United States with its numerous civil liberties and set an example to overthrow both monarchy and colonial governments. The United States has the world's oldest written constitution, and the constitutions of other free countries often bear a striking resemblance to the US Constitution, often word-for-word in places. It inspired the French, Haitian, Latin American Revolutions, and others into the modern era. Although the Revolution eliminated many forms of inequality, it did little to change the status of women, despite the role they played in winning independence. Most significantly, it failed to end slavery which continued to be a serious social and political issue and caused divisions that would ultimately end in civil war. While many were uneasy over the contradiction of demanding liberty for some, yet denying it to others, the dependence of southern states on slave labor made abolition too great a challenge. Between 1774 and 1780, many of the states banned the importation of slaves, but the institution itself continued. In 1782, Virginia passed a law permitting manumission and over the next eight years more than 10,000 slaves were given their freedom. With support from Benjamin Franklin, in 1790 the Quakers petitioned Congress to abolish slavery; the number of abolitionist movements greatly increased, and by 1804 all the northern states had outlawed it. However, even many like Adams who viewed slavery as a 'foul contagion' opposed the 1790 petition as a threat to the Union. In 1808, Jefferson passed legislation banning the importation of slaves, but allowed the domestic slave trade to continue, arguing the federal government had no right to regulate individual states. Historiography A large historiography concerns the reasons the Americans revolted and successfully broke away. The "Patriots", an insulting term used by the British that was proudly adopted by the Americans, stressed the constitutional rights of Englishmen, especially "No taxation without representation." Contemporaries credited the American Enlightenment with laying the intellectual, moral and ethical foundations of the Revolution among the Founding Fathers. Founders referred to the liberalism in the philosophy of John Locke as powerful influences. Although Two Treatises of Government has long been cited as a major influence on American thinkers, historians David Lundberg and Henry F. May demonstrate that Locke's Essay Concerning Human Understanding was far