Answer:
Writers use literature to criticise or endorse social conditions, expressing their own opinions and viewpoints of the world they live in. ... This means that the writer's views and values are always open to interpretation, and possibly even controversial.
Brutus' tragic flaw of idealism contributes to his downfall because he was gullible enough to be convinced by Cassius and Antony that they were going to murder Julius Caesar for Rome's development and goodwill. He was blinded by that idealism and believed that these were their true intentions for inviting him in the murder, thus, making him involved greatly and made him feel guilty - leading him to suicide.