Your way on how a apocalypse started does not have to make sense, or it can make complete sense. Either or its your way. Heres an example lol.
My apocalypse happened when a alien ambasador came to make peace with us. Until a hobbo stole his cape and ran away. The alien dude got really ticked and blew up earth killing all of the humans. Little did he know we had fallout shelters, granted they we mostly cruel tests but hey we still lived!
