 This paper examined the core dimensions of primary care and assessed the evidence for their interrelationships and relevance to outcomes at the health system level. It found that primary care is a complex multidimensional system with three main components, governance, economic conditions, and workforce development. Primary care also has for dimensions, access, continuity of care, coordination of care, and comprehensiveness of care. These dimensions contribute to overall health system performance and health. This article was authored by Van Der Zijouk, Hutchinson Allen, Borma Winky G.W., and others.