This November marks the centenary of Village of Euclid v. Ambler Realty Co., the Supreme Court decision that gave comprehensive zoning its constitutional footing. In 1922, the village of Euclid, Ohio, a Cleveland suburb, adopted a comprehensive zoning ordinance that divided land into use, height, and area districts. Ambler Realty owned roughly 68 acres along Euclid Avenue and the Nickel Plate railroad — land that had obvious industrial and commercial potential. Newton Baker, representing Ambler in their takings complaint, argued that a city’s pre-zoning of undeveloped land was fundamentally unconstitutional and un-American. Euclid will reach 100, but there is reason to hope that Euclid’s flawed premise will not reach its bicentennial intact.