Joseph Addison was an influential English essayist, poet, and politician during the Augustan Age. He co-founded the periodical "The Spectator", which published his essays on literature and criticism. Addison believed literature should cultivate good taste, teach moral lessons, and imitate nature. He admired classical models like Virgil and praised John Milton's "Paradise Lost". Addison's emphasis on reason and morality in literature shaped the neoclassical movement in England.