Plot: Becoming American explores the many journeys to becoming American that defined the “Century of Immigration” (1820s – 1924) and transformed the United States from a sleepy agrarian country into a booming industrial power. Stephen Colbert’s Irish great-great-grandfather escaped poverty and religious oppression in Limerick and never looked back, whereas Mario Batali’s great-grandfather, who left the place where his family had lived for centuries, struggled to survive in the quartz mines of Montana