It has been thirty years since the publication of Irving Abella and Harold Troper's seminal work None is Too Many, which documented the official barriers that kept Jewish immigrants and refugees out of Canada in the shadow of the Second World War. The book won critical acclaim, but a haunting question remained: Why did Canada act as it did in the 1930s and 1940s? Answering this question requires a deeper understanding of the attitudes, ideas, and information that circulated in Canadian society during this period. How much did Canadians know at the time about the horrors unfolding against the...