This picture shows existentialism. The man in handcuffs committed a crime and now he is being punished for it. He chose to do what he did so now he has to face the consequences.
This picture shows nihilism. Their lives are basically meaningless they don't know if they will survive till the next day. Their whole lives are stuck in the trench and they don't know if they'll ever leave.
This picture shows that a mans life have a purpose to it. He needs to be there to raise his child. He has a reason for existing.
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