Music historian James Keannaway explores the "unhealthy" facets of music. Citing examples also published in his book, Bad Vibrations: The History of the Idea of Music as a Cause of Disease, Keannaway points out the mostly politicised agendas behind the notion that music can cause illness, from 18th century fears of over-stimulated nerves to the Nazi concept of "degenerate music", concluding with a discussion of the use of music in the "enhanced interrogation techniques" and acoustic weapons of the "War on Terror."