Which story element is most often found in dystopian fiction?

Dystopian novels often take place in a delusional and destroyed society which is overrun by a government with questionable morals. For example, look at Big Brother in 1984. The protagonist is generally the one who notices something ill about the world they live in. Generally this type of fiction relies on a plot of the heroine/hero questioning their government and snooping around to find out the truth despite putting themselves and their loved ones at risk. The hero learns of how their world came to exist, usually out of some sort of disaster or world wide destruction, and then tries to either fight against it and overthrow the government or escape. TYPICALLY, the hero is successful in their attempts and either a plot twist or ambiguous ending completes the story.