This document provides a literature review and environmental scan on population-based health communication and social determinants of health. It discusses research showing that targeting specific audiences, framing messages based on political ideology, and increasing public support for policies addressing social and environmental factors can help reduce health disparities. The review examines topics like equity, investing in prevention outside of medical care, communicating about shifting investments, and how social circumstances impact behaviors and health outcomes. It provides examples of communication strategies and considerations for population health advocates in messaging around social determinants.