In spirit, Percy Shelley was perhaps the most essentially romantic poet of his age. Intense, idealistic, personal, his is the poetry of youth. His brief, impetuous life aroused great controversy, and, like Byron, he lives on outside his verse. Shelley's work has been criticized for its undisciplined emotionalism. But essentially he was a poet of ideas, and in his search for truth and original human perfection, Shelley was inspired as much by the Greek...