In their discussion paper, Hester and Stange develop ideas that may be familiar to many who work to improve population health broadly conceived. The authors applaud current innovations and new models being tested to address the cost of health and quality of health care, but they find less progress in developing models for improving population health. Several authors have offered conceptual models for an “integrator” function that is needed to support coordination and payment for population health strategies. Hester and Stange build on those ideas and describe a Community Health System with a set of broad responsibilities, such as convening partners and assessing community needs. They then describe how the CHS would develop and implement a sustainable financing model to create and manage a portfolio of interventions grounded in the determinants of health, and balanced in terms of timing of results, level of evidence, and scale of return. Their conceptual financial model explains how the CHS could capture savings realized through the successful implementation of population health strategies, and reinvest the savings into future activities.