Daniel J. B. Mitchell; Impeding Earl Warren: California's Health Insurance Plan That Wasn't and What Might Have Been. J Health Polit Policy Law 1 December 2002; 27 (6): 947–976. doi: https://doi.org/10.1215/03616878-27-6-947
It is widely believed that the turning point for U.S. health insurance came in 1949 when Congress failed to adopt President Harry Truman's proposal for a national system. The possibility that a system of state-level health plans might have emerged before Truman's plan has received little attention. Yet several attempts to enact such a plan were made in California by Governor Earl Warren in the mid-1940s. Had Warren succeeded, the California example might have been emulated by other states and the United States might have evolved a system similar to Canada's provincial programs.