In 19th century America, no science was more important than botany. Understanding plants meant more productive plantations, more wealth extracted from cash crops, and more money flowing into the United States. The science of botany became weaponized, fueling ideas of Manifest Destiny and other programs of political expansion was used for political ends. But other authors and thinkers believed that nature could teach humanity different lessons. Nathaniel Hawthorne’s struggles in his garden inspired him to write stories in which plants defy human efforts to impose order. Radical scientific ideas about plant intelligence and sociality prompted Emily Dickinson to imagine a human polity that embraces kinship with the natural world. Frederick Douglass cautioned that the most prominent political context for plants remained plantation slavery. Today’s guest is Mary Kuhn, author of “The Garden Politic: Global Plants and Botanical Nationalism in Nineteenth-Century America.” We explore how politicians of the 19th century used agriculture as a vehicle for power politics, but the same branch of science contained the seeds of alternative political visions.

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