Sociologists do not favor a biological definition of race, but a discussion of people with "more than one race" reflects a reference to the "biological" aspect of race
Early examples of anti-miscegenation laws singled out those of "Mongoloid" origin specifically, and were later amended to include Filipinos and Asian Indians
Removal of miscegenation laws and a trend toward equal rights and legal protection against racism have steadily reduced the social stigma attached to racial exogamy
In 1967, interracial marriages represented 3% of all newlyweds, and have experienced a steady increase since then, representing 17% of all newlyweds and 10% of all married people in 2015
The categories for race on the Census have changed over time, with Mulatto being a racial category from 1850-1920 (except 1900), and the option for individuals to identify as "more than one race" being added in 2000
In 1930, Mexican was a racial category on the Census, but in 1921, Mexico abandoned its category for race, recognizing the amalgamated ancestry of Mexicans, mestizo/mestiza
The racial categories on the Census do not reflect a category for Latinx, though many do write in Mexican American or Central American, yet the majority of Latinx responded as white, per the 2010 census results
Including the option of checking more than one race has most impacted the American Indian/Alaska Native (AI/AN) population, increasing by more than 160% between 1990 and 2010, with the biggest growth attributed to individuals who marked AI/AN and one other race
Approximately 25,000 Amerasians, offspring of U.S. GIs and Vietnamese women, were allowed to immigrate to the U.S. following the Vietnamese Amerasian Homecoming Act of 1988
The Amerasian population had faced challenging discrimination and hostility in Vietnam following the U.S. war in Vietnam that ended in the fall of Saigon and "reunification" of Vietnam in 1975