In Asimov’s novel, Nightfall (Was a movie also), The planet in question has constant daylight, for roughly 2000 years at a stretch. THEN comes an eclipse, when NO SUNS are visible! Since it was constant daylight, the people of the planet never saw any other stars or even thought there were any other places in their universe. The mass hysteria every 2000 years would destroy their civilization by burning everything they could get their hands on to have LIGHT! Then the cycle would repeat itself.................................
Similar plot in the Three-Body Problem.