Global healthcare systems reveal a mosaic of approaches to organizing, funding, and delivering care, inviting us to explore how policy choices, cultural expectations, and economic constraints shape outcomes across regions, populations, and time, and to consider the long arc from historical models to contemporary reforms, a perspective that illuminates both progress and persistent gaps.By examining healthcare models worldwide and universal health coverage case studies, we learn what tends to work, what fails, and why context matters for reform, while recognizing that success often depends on political will, governance capacity, resource allocation, the incentives embedded in funding mechanisms, and the ability to translate policy into everyday practice.