The author Sheila Whiteley attributes "Sgt. Pepper" underlying philosophy not only to the drug culture, but also to metaphysics and the non-violent approach of the flower power movement. The musicologist Oliver Julien views the album as an embodiment of "the social, the musical, and more generally, the cultural changes of the 1960s". The album's primary value, according to Moore, is its ability to "capture, more vividly than almost anything contemporaneous, its own time and place". Whiteley agrees, crediting the album with "provid a historical snapshot of England during the run-up to the Summer of Love". Several scholars have applied a hermeneutic strategy to their analysis of "Sgt. Pepper" lyrics, identifying loss of innocence and the dangers of overindulgence in fantasies or illusions as the most prominent themes.