Philanthropy in America has sparked numerous innovations in the fields of education, social work, and public health, but rarely has it been instrumental in generating and sustaining a popular social movement. In the Post-World War One decade, however, the Laura Spelman Rockefeller Memorial (LSRM) did just that, subtly but aggressively nurturing and coordinating the long-since-forgotten parent education movement. For hundreds of thousands of middle-class Americans, principally young mothers, parent education provided not only a topic of everyday conversation and a structure for continuing education, but a genuine social cause. Philanthropy alone did not create this crusade, of course. Many other factors were involved, some antedating the war, others originating in the twenties and reflecting its distinctive political and cultural spirit. Nonetheless, LSRM's role was central and formative, and merits considerably more attention from historians of education and of philanthropy than it has heretofore received.