Big Question for The Hunger Games

My big question for the Hunger Games is wether or not one person has the power to change an entire society. In the story Katniss goes to the Games completely confused and unsure what she is going to do. She is confused, angry, and very depressed. But as soon as she enters the arena she is only thinking of one thing and that is her survival. Once the gamemakers mention that the tributes from one district can both survive, her thinking shifts from what she wants to where Peeta is and what he needs right now. Once the games are almost over and they are the only two left another announcement comes on saying that the two can no longer survive together. She says that she is no longer able to live with out him so they both fake taking a posin berry that will kill both of them until the Gamemakers change what they said. This begins an instant change and uprising in the district challenging the Capitols power and changing the entire society.