Susan Sontag was a complete feature—writer, film-maker, philosopher, teacher, and political activist. The New Yorker was an exceptional critic of photography too, springing from her collodion romance that gave each picture a cerebral and surreal tone. She wrote On Photography: “In the real world, something is happening and no one knows what is going to happen. In the image-world, it has happened, and it will forever happen in that way.” With her words as helpmate, we dig deep into our archives…