Cowper is the most important English poet of the period between Pope and the illustrious group headed by Wordsworth, Byron, and Shelley, which arose out of the intellectual ferment of the European Revolution. As a reformer of poetry, who called it back from conventionality to nature, and at the same time as the teacher of a new school of sentiment which acted as a solvent upon the existing moral and social system, he may perhaps himself be numbered among the precursors of the revolution, though he was certainly the mildest of them all. As a sentimentalist he presents a faint analogy to Rousseau, whom in natural temperament he somewhat resembled.