Which guiding principle advocates for the treatment of all individuals without bias?

The guiding principle that advocates for the treatment of all individuals without bias is fairness. Fairness embodies the concept of equity and justice, emphasizing that everyone should be treated equally and without favoritism or discrimination. Under this principle, individuals can expect to receive the same consideration and opportunity, regardless of their background, identity, or differing circumstances.

While professionalism, respect, and inclusiveness are also vital principles in fostering positive interactions and environments, they do not specifically encapsulate the idea of unbiased treatment to the extent that fairness does. Professionalism relates more to the conduct and approach within a professional context, respect pertains to acknowledging the inherent worth of individuals, and inclusiveness focuses on ensuring that diverse groups are represented and valued. Fairness is the core principle that drives unbiased treatment, making it the most suitable answer in this context.