Allen Stouffer has written the first book-length examination of Canadian antislavery from a British North American, and Canadian primary sources. Earlier studies concluded that Canadian antislavery was largely the result of Canada's proximity to the Untited States, a proximity which precluded Canada's ignoring the situation. While Stouffer recognizes the importance of the American influence, he shows that the leaders of Canadian antislavery were immigrants from Britain who had been deeply involved in antislavery in their homeland.