The first United States Census was conducted in New York in 1790. It demonstrates the three-fifths classification of African Americans according to the 1787 Philadelphia Convention compromise between Northern and Southern states. The Three-Fifths Compromise is arguably one of the most important documents of the New Republic; it allowed for only three-fifths of the slave population to be counted for purposes of taxation and representation in Congress. The Kinseys believe this compromise enabled the South to control the presidency and Supreme Court while having 50% fewer people than the North.