What year did slavery become illegal in the united states

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  http://www.britannica.com/topic/slavery-sociology
It was rare among primitive peoples, such as the hunter-gatherer societies, because for slavery to flourish, social differentiation or stratification was essential. A variant on the selling of children was the exposure, either real or fictitious, of unwanted children, who were then rescued by others and made slaves

Transcript of the Constitution of the United States - Official Text

  http://www.archives.gov/exhibits/charters/constitution_transcript.html
No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any Person be eligible to that Office who shall not have attained to the Age of thirty five Years, and been fourteen Years a Resident within the United States. This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding

  http://www.infoplease.com/ipa/A0749825.html
But in choosing the President, the votes shall be taken by states, the representation from each State having one vote; a quorum for this purpose shall consist of a member or members from two thirds of the states, and a majority of all the states shall be necessary to a choice. Thereafter, when the President transmits to the President pro tempore of the Senate and the Speaker of the House of Representatives his written declaration that no inability exists, he shall resume the powers and duties of his office unless the Vice President and a majority of either the principal officers of the executive department or of such other body as Congress may by law provide, transmit within four days to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office

The United States Constitution - The U.S. Constitution Online - USConstitution.net

  http://www.usconstitution.net/const.html
But in chusing the President, the Votes shall be taken by States, the Representation from each State having one Vote; a quorum for this Purpose shall consist of a Member or Members from two-thirds of the States, and a Majority of all the States shall be necessary to a Choice. If, at the time fixed for the beginning of the term of the President, the President elect shall have died, the Vice President elect shall become President

Civil Rights for Kids: History of Slavery in the United States including slave codes, abolitionism, free states vs. slave states, the Underground Railroad, Emancipation Proclamation, and the 13th amendment.

  http://www.ducksters.com/history/civil_rights/history_of_slavery_in_the_united_states.php
Constitution, slaves were counted as three-fifths of a person when the state's population was counted to determine how many Congressmen represented the state. Emancipation Proclamation During the Civil War, President Abraham Lincoln gave the Emancipation Proclamation which declared that the slaves in the South were free

The First Legal Slave Owner in What Would Become the United States was a Black Man

  http://www.todayifoundout.com/index.php/2013/08/the-first-legal-slave-owner-in-what-would-become-the-united-states-was-a-black-man/
How is this information crucifying blacks? If anything it shows that we as blacks have the same mental capacity meaning reason and logic as the white man. In 1635, after working on the tobacco farm for about 14 years, Johnson was granted his freedom and acquired land and the necessaries to start his own farm