John Dryden was an influential 17th century English poet, playwright, and literary critic. He wrote extensively across various genres including satires, poems, plays and criticism. As a critic, Dryden advocated for neoclassical ideals like the three unities of drama and verisimilitude. He praised Shakespeare as the greatest English writer and analyzed various dramatic forms in his essay "Of Dramatic Poesie". Dryden's literary criticism emphasized judgment, unity of design, and the use of satire for social commentary. His advocacy of heroic couplets and neoclassical principles greatly influenced subsequent English literature.