Buddhist history in the United States traces to the mid-19th century, when early scholars and spiritual pioneers first introduced the subject to Americans, followed soon by the arrival of Chinese immigrants to the West Coast. Interest in Buddhism was significant during the late Victorian era, but practice was almost completely confined to Asian immigrants, who faced severe white prejudice and legal discrimination. The Japanese were the first to establish robust, long-lasting temple networks, though they, too, faced persecution, culminating in the 1942 incarceration of 120,000 Japanese Americans, a severe blow to American Buddhism. Outside the Japanese American community, Buddhism grew slowly in the earlier decades of the 20th century, but it began to take off in the 1960s, aided soon by the lifting of onerous immigration laws and the return of large-scale Asian immigration. By the end of the 20th century American Buddhism had become extremely diverse and complex, with clear evidence of permanence in Asian American and other communities.