Simplify the following text for a Grade 12 native English-speaking person.
Original: Apocalyptic fiction is concerned with the end of civilization through war ( On the Beach ) , pandemic ( The Last Man ) , astronomic impact ( When Worlds Collide ) , ecological disaster ( The Wind from Nowhere ) , or mankind 's self-destruction ( Oryx and Crake ) , or some other general disaster or with a world or civilization after such a disaster .
Simplified: Apocalyptic fiction is about the end of civilization . There are several types : through war ( On The Beach ) , pandemic ( The Last Man ) , astronomic impact ( When Worlds Collide ) , ecological disaster ( The Wind From Nowhere ) , or mankind 's self-destruction ( Oryx and Crake ) , or some other general disaster .