@SumBlackguyz, the entire movie is summed up by the quote at the end: “Where must we go, we who wander this wasteland, in search of to better ourselves.”
The entire film is an allegorical tale about triumphing over your own challenges and trials in your life, not by running around from them, but facing them dead on and going back and uproot the problem from where it all began.
There's a lot of biblical and spiritual symbolism throughout and moralistic themes of guilt (Max), hope (The Wives), redemption (Furiosa) and faith (Nux). All of them with the exception of Max believed in some false "promise land" and their entire venture was to reach this promise land except it doesn't exist. Max being the only nonbeliever because of the guilt he was carrying to which is why he told Furiosa how hope could make one go insane. He, himself, was wrong when he caught an epiphany through his visions of the girl he couldn't save when he realizes that he can also find redemption in saving those people in reaching their goal which was too return back home. Everything they were search for was right there. Instead of running away from that existence, it is better to face it and change it for the better which means directly go through the obstacle that's after them.
Thus the quote at the end. All of them were seeking better lives... going off seeking a better life without realizing that it can be found right where they were at to begin with.