Works with individuals, communities, healthcare, schools, and worksites to help promote healthy living, learning, work and play. Promotes wellness and behaviors that prevent disease. Key principles: - Upstream: Focus on prevention, such as healthy eating rather than cancer or heart disease - Community Engagement: Share ownership of work through collaborations and partnerships - Health Equity: Aim for the highest level of health for all residents - Policy, System, and Environmental Change: Make healthy choices easy, safe, and affordable - Evidence-Based: Choose interventions that have been shown to work