 During this period he published a number of literary treatises which showed the strong influence of Babbitt and demonstrated his belief that human life and human nature are the only proper subjects for literature.The best known among these are "The Romantic and the Classical", "Literature and Revolution", "The Seriousness of Literature", and "The Permanence of Literature".In each of these treatises, he upheld the intrinsic value of literature as something that transcends social class and strongly opposed using literature for propagandist purposes.