Reynolds has become well-known for his incorporation of critical theory in his analysis of music. He has written extensively on gender, class, race, and sexuality, and their influence on music.
The Sex Revolts discusses gender in rock music. In his study of the relationship between class and music, Reynolds coined the term
liminal class, defined as the upper-working class and lower-middle-class. This is a group he credits with "a lot of music energy".
Reynolds has also written extensively about drug culture and its relationship to and effect on music. In his book,
Generation Ecstasy, Reynolds traces the effects of drugs on the ups and downs of the rave scene. His evidence of his interest in the topic can be found in
Generation Ecstasy, and in his review of
Trainspotting, among other things.
Reynolds was influenced by philosophers as well as music theorists, including:
- Gilles Deleuze
- Félix Guattari
- Brian Eno
- Joe Carducci
- the Situationists
He has on occasion used the Marxist concepts of commodity fetishism and false consciousness to describe attitudes prevalent in hip hop music.