It took the Civil War, the bloodiest war in American history, for Lincoln to begin to make Jefferson’s vision of equality a constitutional reality. After the war, the Declaration’s vision was embodied in the 13th, 14th, and 15th Amendments to the Constitution, which formally ended slavery, guaranteed all persons the “equal protection of the laws,” and gave African-American men the right to vote. At the Seneca Falls Convention in 1848, when supporters of gaining greater rights for women met, they, too, used the Declaration of Independence as a guide for drafting their Declaration of Sentiments. (Their efforts to achieve equal suffrage culminated in 1920 in the ratification of the 19th Amendment, which granted women the right to vote.) And during the civil rights movement in the 1960s, Dr. Martin Luther King, Jr. said in his famous address at the Lincoln Memorial, “When the architects of our republic wrote the magnificent words of the Constitution and the Declaration of Independence, they were signing a promissory note to which every American was to fall heir. This note was a promise that all men — yes, black men as well as white men — would be guaranteed the unalienable rights of life, liberty, and the pursuit of happiness.”