The present thesis aims to study two outstanding plays of postwar American drama: Lorraine Hansberry’s A Raisin in the Sun (1959) and Maria Irene Fornes’s The Conduct of Life (1985). The thesis will seek to identify and explore common themes addressed in both plays. I will argue that despite the different socio-cultural background of the two dramatists and the dissimilar dramatic methods employed by them, the issues of integration and separation from the white male-dominated American post-war society lie at the core of their plays. Both works deal with oppressed people’s marginalization, subordination, and their consequences in the bicultural context of American society. As I will point out the dramatists’ personal ethnic background—Hansberry is Afro-American (1930-1965), while Fornes is of Cuban origin (1930-)—may have influenced their thematic focus in their drama. In addition to Fornes’ bicultural background, she is also a lesbian playwright that influences her choice and treatment of themes in her plays.