imagery. In the 1950s, a wave of new critical approaches replaced modernism and paved the way for post-modern studies of Shakespeare. By the 1980s, Shakespeare studies were open to movements such as structuralism, feminism, New Historicism, African-American studies, and queer studies. Comparing Shakespeare's accomplishments to those of leading figures in philosophy and theology, Harold Bloom wrote, "Shakespeare was larger than Plato and than St. Augustine. He encloses us because we see with his fundamental perceptions." Works Classification of the plays Shakespeare's works include the 36 plays printed in the First Folio of 1623, listed according to their folio classification as comedies, histories, and tragedies. Two plays not included in the First Folio, The Two Noble Kinsmen and Pericles, Prince of Tyre, are now accepted as part of the canon, with today's scholars agreeing that Shakespeare made major contributions to the writing of both. No Shakespearean poems were included in the First Folio. In the late 19th century, Edward Dowden classified four of the late comedies as romances, and though many scholars prefer to call them tragicomedies, Dowden's term is often used. In 1896, Frederick S. Boas coined the term "problem plays" to describe four plays: All's Well That Ends Well, Measure for Measure, Troilus and Cressida, and Hamlet. "Dramas as singular in theme and temper cannot be strictly called comedies or tragedies", he wrote. "We may, therefore, borrow a convenient phrase from the theatre of today and class them together as Shakespeare's problem plays." The term, much debated and sometimes applied to other plays, remains in use, though Hamlet is definitively classed as a tragedy. Speculation Authorship Around 230 years after Shakespeare's death, doubts began to be expressed about the authorship of the works attributed to him. Proposed alternative candidates include Francis Bacon, Christopher Marlowe, and Edward de Vere, 17th Earl of Oxford. Several "group theories" have also been proposed. All but a few Shakespeare scholars and literary historians consider it a fringe theory, with only a small minority of academics who believe that there is reason to question the traditional attribution, but interest in the subject, particularly the Oxfordian theory of Shakespeare authorship, continues into the 21st century. Religion Shakespeare conformed to the official state religion, but his private views on religion have been the subject of debate. Shakespeare's will uses a Protestant formula, and he was a confirmed member of the Church of England, where he was married,