Eighteen ninety marks a curious inflection point in American history. According to LessWrong, the year represents a convergence of six major developments: the Census Bureau declared the frontier officially closed, the Indian Wars ended with Wounded Knee, America reckoned with its new permanent working class and widening inequality, Herman Hollerith deployed the first punched-card tabulating machines—early computers—to process census data, and three decades later, Congress would use that same 1890 census to restrict immigration for decades. Together, these threads trace the moment when America stopped being a frontier nation and became an industrial superpower wrestling with its own inequalities.

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