Why did Brecht use dual roles?

Bertolt Brecht used dual roles to create a sense of alienation, encouraging audiences to critically engage with the performance rather than becoming emotionally absorbed in the characters. By having actors portray multiple roles, Brecht aimed to highlight the constructed nature of theater and to challenge the audience's perceptions of identity and morality. This technique reinforced his ideas about social and political themes, prompting viewers to reflect on the societal issues presented in the play. Ultimately, dual roles served to enhance Brecht's goal of promoting critical thought and social change.