At the close of the Second World War, racist immigration laws trapped enclaves of old men in Chinatowns across the United States, preventing their wives or families from joining them. They took refuge from loneliness in the repartee and rivalries exchanged over games of mahjong in the backrooms of barbershops or at the local tong. These bachelors found hope in the nascent marriages and future children who would someday grow roots in American soil, made possible at last by the repeal of the...