Major-minor tonality refers to the system of musical organization that is built on the distinction between major and minor scales, which creates different emotional qualities in music. Major tonality often conveys a sense of brightness, happiness, or triumph, while minor tonality is associated with feelings of sadness, introspection, or melancholy. This framework forms the backbone of much of Western music, especially during the Baroque period, where composers skillfully utilized these tonalities to evoke varied emotional responses and to structure their compositions.