Childhood's End (1953)

The novel opens with enormous silver ships descending in silence over the world's great cities—never firing a shot, yet ending every war overnight. The alien Overlords stay hidden for fifty years, governing remotely through a single spokesman, Karellen, before finally revealing a shape straight out of nightmare: horned, winged and tailed, the very image of the devil. Clarke turned the idea of a mute mothership standing over a skyline into something at once serene and unsettling—a template that Independence Day, V and Arrival would later borrow again and again, and a founding image of aliens who conquer without a single shot.^[1]