In ''Becoming Divine: Towards a Feminist Philosophy of Religion'', Jantzen proposed a new philosophy of religion from a feminist perspective. She also authored works on Christian mysticism and the foundations of modernity. Her approach was influenced by Continental scholarship, particularly that of Foucault.
In her final publication, ''Foundations of Violence,'' Jantzen, sketches the fascination with death and violence -- what she calls a 'necrophilia' -- that she believes has characterized much of Western culture from classical antiquity through Christianity to present paradigms. In Jantzen's view, this emphasis on violence and death comes at the expense of the physical body in the present (a denigration of the senses, sexuality and sensuality), and thus, establishes a yearning for mystical worlds beyond the here and now.