In Double Victory, there emerges a broad spectrum of American voices to illustrate the various struggles and victories fought during wartime: a Japanese-American at an internment camp; a Native American code breaker using the Navajo language for the first time; a Mexican-American woman, "Rosarita, the riveter," who was able to work a job during wartime other than as a housecleaner or a maid. Takaki also considers the racial biases that influenced important American government actions during the war, such as the bombing of Hiroshima and the refusal to admit Jews into the U. S. Double Victory clearly demonstrates that World War II helped to transform American society and advance the cause of multiculturalism throughout the country.