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“The zone plan drafted by Whitten and published by the Atlanta City Planning Commission in 1922 explained that “race zoning is essential in the interest of the public peace, order and security and will promote the welfare and prosperity of both the white and colored race.”
― Richard Rothstein, The Color of Law: A Forgotten History of How Our Government Segregated America

“In 1917, the Supreme Court overturned the racial zoning ordinance of Louisville, Kentucky, where many neighborhoods included both races before twentieth-century segregation. The case, Buchanan v. Warley, involved an African American’s attempt to purchase property on an integrated block where there were already two black and eight white households. The Court majority was enamored of the idea that the central purpose of the Fourteenth Amendment was not to protect the rights of freed slaves but a business rule: “freedom of contract.” Relying on this interpretation, the Court had struck down minimum wage and workplace safety laws on the grounds that they interfered with the right of workers and business owners to negotiate individual employment conditions without government interference. Similarly, the Court ruled that racial zoning ordinances interfered with the right of a property owner to sell to whomever he pleased.”
― Richard Rothstein, The Color of Law: A Forgotten History of How Our Government Segregated America

“Durham said, “Do you know what a Garden-of-Eden configuration is?” Maria was caught blank for a second, then she said, “Yes, of course. In cellular automaton theory, it’s a state of the system that can’t be the result of any previous state. No other pattern of cells can give rise to it. If you want a Garden-of-Eden configuration, you have to start with it – you have to put it in by hand as the system’s first state.”
― Greg Egan, Permutation City

“In 1926, Indianapolis adopted a regulation permitting African Americans to move to a white area only if a majority of its white residents gave their written consent, although the city’s legal staff had advised that the ordinance was unconstitutional.”
― Richard Rothstein, The Color of Law: A Forgotten History of How Our Government Segregated America