The collection consists primarily of materials documenting the Progressive Citizens of America (PCA), Southern California Chapter and the Independent Progressive Party (IPP) in Southern California. Also in the collection are clippings pertaining to Upton Sinclair's EPIC (End Poverty in California) program, his 1934 California Gubernatorial Campaign, and material on Irwindale political figure Antonio Silva (1961).

Attorney Edward (Ed) Mosk, who died in the early 1980s, lived much of his adult life in the Los Angeles area. He was involved with a number of progressive causes and was an active member of the Progressive Citizens of America (PCA) and successor organization, the Independent Progressive Party (IPP) of California. In 1947, Mosk was elected to the Executive Board of the PCA. He also served as Chairman of the Los Angeles chapter of the American Committee for Yugoslav Relief. Mosk was the brother of Stanley Mosk who served as the California State Attorney General and then as a Justice on the California Supreme Court.The Progressive Citizens of America (PCA) was a left-liberal coalition with a pro-labor and pro-civil rights agenda. In December 1947, Henry Wallace, former Secretary of Agriculture and former Vice President, who since 1946 had been working closely with the organization, officially declared himself a candidate for President in the 1948 election. In August 1947, despite the wish of many progressives such as former California Attorney General Robert Kenny (who had served as Chairman of the Southern California Chapter of the PCA) and Carey McWilliams, the Independent Progressive Party (IPP) of California was formed. "The IPP was launched under the auspices of the Joint Trade Union Committee for a Third Party." (MacDougall, p. 190)

1 box, 1 half-box, 1 half-legal box, and 2 oversized folders

1+ linear feet

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