“Poets are the unacknowledged legislators of the world.”
Shelley argues that imaginative writers can reshape moral language, social possibility and public feeling without holding formal legislative office.
Source details
A Defence of Poetry, written 1821 and first published posthumously in 1840; Wikisource transcription. This is the essay’s concluding sentence and summarizes Shelley’s historical literary theory about poetry’s indirect cultural and political influence, not literal legislative authority.