What is the relevance of the Arab Spring to the work of the MacArthur Foundation? Given constant, often dramatic and unexpected, global change, MacArthur is committed to being ever more agile, creative, and adaptable in order to bring about meaningful social change. In his annual essay, MacArthur President Robert Gallucci reflects on how the Foundation focuses intensely on the learning implicit in its grantmaking process and how that knowledge translates into new ways of approaching philanthropy.