A core principle of primary health care (PHC) is community participation because it empowers individuals and communities to take an active role in their own health management. This involvement ensures that health services are tailored to the specific needs and values of the population, improving accessibility, acceptability, and sustainability of care. PHC emphasizes integrated, culturally appropriate, and preventive services rather than relying solely on specialist or tertiary care. Engaging communities helps in resource mobilization, health education, and fostering local ownership, which are essential for effective health outcomes.

Reference: Primary Health Care: Theory and Practice, Margaret M. Barry, 2nd Edition.