What is the author's style in Regarding the Pain of Others by Susan Sontag?

Sontag proceeds with a healthy quantity of skepticism. She is unwilling to believe, for instance, that the photograph is an unquestionable record of truth. Shots can be staged. Photos can be altered. Sontag is similarly suspicious of humanity's desire to see and/or avoid the suffering of others, seeing neither response as uncomplicated. In her quest for answers, Sontag is unwilling to accept matters at face value.