Starting in the early 1900s, many thousands of native Filipinos were conscripted as laborers in American West Coast agricultural fields and Alaska salmon canneries. There, they found themselves confined to exploitative low-wage jobs in racially segregated workplaces as well as subjected to vigilante violence and other forms of ethnic persecution.  In time, though, Filipino workers formed political organizations and affiliated with labor unions to represent their interests and to advance their struggles for class, race, and gender-based social justice. Union by Law analyzes the broader social and legal history of Filipino American workers’ rights-based struggles, culminating in the devastating landmark Supreme Court ruling, Wards Cove Packing Co. v. Atonio (1989). Organized chronologically, the book begins with the US invasion of the Philippines and the imposition of colonial rule at the dawn of the twentieth century. The narrative then follows the migration of Filipino workers to the