" The very first U.S. census began on August 2, 1790, a year after the inauguration of President George Washington. Census takers in 1790 counted the number of persons in each household according to the following categories: free white males sixteen years and older, free white males under sixteen years, free white females, all other free persons, and slaves. Since then, every U.S. census has sorted people by race—but the racial groupings have changed twenty-four times over the last two hundred years. In the second census, taken in 1800, Indians were specified as a separate category of free persons. Chinese were added to the 1870 census. In 1920, race had become even more complicated. That census included ten racial categories: white, black, mulatto, Indian, Chinese, Japanese, Filipino, Hindu, Korean, and other. By the end of the twentieth century, the racial groupings were consolidated into five main choices: American Indian or Alaska native, Asian, black or African American, native Hawaiian or other Pacific Islander, and white. "

― Dorothy Roberts , Fatal Invention: How Science, Politics, and Big Business Re-create Race in the Twenty-First Century