Romanticism is often reduced to nostalgic pastoralism and solitary contemplation of the sublime. But a radical strand of Romantic writers and thinkers offered sweeping political, ecological, and religious critiques of capitalism, racism, settler colonialism, and environmental destruction. Interweaving canonical nineteenth-century authors with Black and Indigenous thinkers who transformed their work, this book is a bold new account of Romanticism for today's deeply entrenched crises. Mark S. Cladis examines the progressive democratic, religious, and environmental beliefs and practices that informed European Romantic literature and its sustained legacies in North America. His interpretation interweaves diverse voices such as W. E. B. Du Bois, Zora Neale Hurston, and Leslie Marmon Silko while also revealing the progressive visions of Romantic authors such as Rousseau, William and Dorothy Wordsworth, Coleridge, Mary Shelley, Thoreau, and Margaret Fuller. Forging connections among literary and philosophical traditions while closely reading a wide range of texts, Radical Romanticism shows how storytelling is central to the pursuit of justice and flourishing for the human and the more-than-human worlds. Bringing together environmental humanities, literary theory, political theory, and religious studies, this book makes the case for a renewed radical Romanticism, offering urgent resources for a world beset by catastrophe, uncertainty, and despair.