The document discusses the British social class system. It was once rigidly defined but is gradually eroding due to economic changes and multiculturalism. Traditionally, classes were defined by occupations and influenced factors like education and marriage opportunities. The main classes were the upper class of inherited wealth and titles, the middle class of professionals and business owners, and the lower working class of manual laborers. Today, the strict definitions of classes have blurred and most British people no longer strongly identify with a particular class.