How did the social roles of the characters affect their individual happiness ???

Theater, in Shakespeare's play, is posited as a means to dissolve class barriers. Through the art of acting, the servant Tranio becomes his master, the wealthy Lucentio becomes the "meaner" Cambio (1.1: 206), the Pedant becomes Vincentio, "a merchant of incomparable wealth" (4.2: 99) - and the drunken tinker Christopher Sly becomes a lord.

Through these depictions of class as mere performance, Shakespeare suggests that the only traits separating the lower from the upper classes and social roles are largely superficial. Class barriers in The Taming of the Shrew are not a matter of innate endowment or superior virtue; they simply follow from a style of speech and dress. Class status, in other words, can be attained by a costume and a pretty speech. This theme pervades subsequent, non-Shakespearean dramas as well, most notably The Marriage of Figaro and Pygmalion.