Society is not well taken care of, for better or worse. Abandoned by the city of Gotham City, Fleck gradually tumbles down the hill to madness, transforming into a charismatic criminal named Joker. One of the issues in this story is justice and order. Will Gotham City as it exists today prioritize justice, or will it eliminate those who disturb it so that the form it has now is not disturbed? The former would be justice and the latter order. It is only natural that such joker-like excluders would have a distaste for society. There is justice in both. It is also natural that each individual will have a different justice. How do these different justices intersect? Perhaps they will have to fight. The weak conquer the strong with violence. The fundamental nature of society will not change in the future. The question is how we will deal with the dark heroes and the state of society that this film depicts. In my opinion, we need people who cling to power and authority to some extent and people who have been abandoned by society. Different justices do not mix. That is why it is also important that there is a large middle class that does not directly involve the two people I mentioned earlier. This will ensure order and security. Will human life be equal? This complicates the issue further. How can weak people like the Joker have a way to change the composition of this world? I believe that this film captures the essence of human greed.