A Streetcar Named Desire deals with class differences in New Orleans during the 1940s. One point of view is that of a fading Southern belle, with outdated ideals about the socially elite and those she considers "beneath" her social rank – like second or third-generation immigrants. Contrast this with the opposing, more modern (at the time) point of view that Americans are Americans, and that immigrants are the foundation of the U.S.
Neither Stella nor Stanley takes class into consideration when regarding their relationship. They exist outside class boundaries all together.
Stella and Stanley’s attraction for each other is based solely on their class differences.