Richard Skolnik, lecturer for Yale's Essentials of Global Health course, walks through the findings of the Lancet Commission on Investing in Health. He lays out the commission's core argument that strategic health spending in low and middle income countries produces returns far beyond the health sector, citing projected gains in life expectancy and economic growth tied to expanded access to essential interventions. Skolnik covers the commission's proposed investment framework, including its case for a grand convergence in reducing infectious, maternal, and child deaths within a generation, and touches on financing mechanisms and the role of universal health coverage in getting there. The lecture is part of a numbered series building out the course's overview of global health economics and policy, and this session functions as a close reading of one influential report rather than a broad survey.