In the summer of 1975, the young director Steven Spielberg set new standards for cinema worldwide with an oversized shark bite, a plastic shark fin and an unmistakable two-note main theme composed by John Williams. With the horror from the deep, a man-eating, gigantic great white shark, the film of the same name became a similarly traumatic reference as Alfred Hitchcock's "Psycho": it triggered lasting primal fears across generations. On the beaches of the world, there was clearly a "before" and...