Images of real, violent death are now routine on screens big and small, and nobody knows what they’re doing to us

I was pretty young, but I remember with fascination and horror the stills from the Zapruder film of the John Kennedy assassination. Frame by frame, Life Magazine, which in those days defined news photography, in early 1964 ran the grainy color 8mm images of the murder—Kennedy grabbing his throat as the first bullet hit him, […]