A major new study of Percy Shelley's intellectual life and poetic career, Shelley and the Revolutionary Sublime identifies Shelley's fascination with sublime natural phenomena as a key element in his understanding of the way ideas like 'nature' and 'imagination' informed the social and political structures of the Romantic period. Offering a genuinely fresh set of perspectives on Shelley's texts and contexts, Cian Duffy argues that Shelley's engagement with the British and French discourse on the sublime had a profound influence on his writing about political change in that age of revolutionary crisis. Examining Shelley's extensive use of sublime imagery and metaphor, Duffy offers not only a substantial reassessment of Shelley's work but also a significant re-appraisal of the role of the sublime in the cultural history of Britain during the Romantic period.