Beginning in the late eighteenth century, diverse anti-slavery efforts transformed the geography of slavery and freedom in the Atlantic world. Haiti, Sierra Leone, Liberia, Upper Canada, Mexico, the newly independent South American nations, and the British West Indies all became havens of free soil, where emancipation laws either immediately or gradually freed enslaved populations. This dissertation argues that these “free-soil havens” had a powerful influence on American anti-slavery culture between 1813 and 1863. As abolitionists battled slaveholders to sway public opinion toward the anti-slavery cause, free-soil havens provided concrete geopolitical spaces through which American slaves, free people, and anti-slavery advocates could imagine alternative possibilities to slavery and racism in the United States. Reading across the rich print culture produced by nineteenth-century politicians, activists, migrants, missionaries, travelers, and newspaper editors, this study . . .