King Lear exists in two different texts: the Quarto (1608) and the Folio (1623). Because each supplies passages missing in the other, for over 200 years editors combined the two to form a single text, the basis for all modern productions. Then in the 1980s a group of influential scholars argued that the two texts represent different versions of King Lear, that Shakespeare revised his play in light of theatrical performance. The two-text...