However, the main source of conflict and the force driving the protagonist's actions is the societal indifference and inaction that allows the titular bystander, Michael, to be a victim of violence. This indifference is embodied by:
* The people who witness Michael's assault but don't intervene: The book focuses on the bystanders' inaction and the devastating impact it has on Michael.
* The police: The police investigation is portrayed as lackluster and inefficient, highlighting the systemic failure to adequately address crimes like Michael's.
* The media: The media coverage trivializes Michael's story, further contributing to societal apathy.
Therefore, it's more accurate to say that the antagonist in "Bystander" is not a single individual, but rather a system of societal indifference and inaction. This system, characterized by the unwillingness of individuals and institutions to act against violence, is ultimately responsible for the suffering of the protagonist.