In 1914, over a million immigrants arrived in the United States, following the footsteps of ten million others in the prior decade. This surge of newcomers, many from diverse backgrounds, sparked a debate among government officials and the press advocating for stricter immigration policies. In They Who Knock at Our Gates, Mary Antin addresses this critical discussion through three fundamental questions. First, the ethical dilemma—what right do we have to limit new arrivals, considering the equal natural rights highlighted in our founding documents? Second, the factual inquiries—who are these new immigrants, what unique strengths and qualities do they bring, and what biases influence our perceptions of them? Lastly, the complex question of personal interpretation—how can we judge, without prejudice, whether immigration benefits our nation and its citizens? Antins insightful analysis from a century ago resonates powerfully with todays readers. (Summary by Maria Kasper)