Beginning with Peter Kivy's work in the 1970s, analytic philosophy has contributed extensively to the aesthetics of music. Analytic philosophy pays very little attention to the topic of musical beauty. Instead, Kivy inspired extensive debate about the nature of emotional expressiveness in music. He also contributed to the debate over the nature of authentic performances of older music arguing that much of the debate was incoherent because it failed to distinguish among four distinct standards of authentic performance of music (1995).