Final answer:
John Stuart Mill recognized the potential negative downsides of freedom, such as harm to others, and proposed the harm principle to limit freedom in such cases.
Step-by-step explanation:
John Stuart Mill believed in the importance of individual freedom, but he also recognized that there could be potential negative downsides to it. He acknowledged that unrestricted freedom could lead to harm and negative consequences for others. For example, if someone's actions cause harm or infringe upon the rights of others, it would be necessary to limit their freedom. Mill proposed the harm principle, which states that a person's actions should only be limited if they harm another person. This principle allows for the protection of individuals' rights and well-being while still valuing personal freedom.