Ever see that movie? The pamphlets that you describe remind me of the plot in The Road Warrior.
The narration in the beginning of the movie tells us that a world war has occurred, but it isn't clear whether that happens before or after the events in the first movie, Mad Max. In any case, the setting of RW is very desolate - "the wasteland," a desert with nothing but roads, nomadic gangs, sand and rock. Everyone is desperate to obtain gas. Those who have it have some degree of independence, and can also use it as a defensive weapon. Intriguing.