Eighteenth-century Britain was strictly organized according to class, and social mobility between these classes was largely impossible. The theater represents this social separation, as Evelina is dressed to sit in the upper-class section (she was originally going with the upper-class Mirvans), while the Branghtons are not. The Branghtons are middle-class and have made their money through trade rather than inherited family wealth. Therefore, the Branghtons are not familiar with upper-class culture, such as the opera. Mr. Branghton does not want to admit his ignorance to Evelina, however, because he is a social climber and wants to blend in with the nobility—even though he cannot because of his middle-class status.