The deaths caused by Kira in the anime "Death Note" have a significant impact on the moral fabric of society within the storyline. Kira's actions lead to a debate on the justification of his vigilantism, with some people supporting his view of punishing criminals and others condemning his disregard for due process and the rule of law. As Kira's killings escalate and the death toll rises, society becomes increasingly divided, with individuals questioning the ethics of taking justice into one's own hands. The moral ambiguity surrounding Kira's actions raises complex philosophical and ethical dilemmas about the nature of justice and the boundaries of individual power in relation to societal norms.