Robert Giloth, Ph.D., Susan Gewirtz Sharing and leveraging learning from mistakes is an important but underutilized resource to improve philanthropic investments and nonprofit performance. Philanthropic mistakes extend beyond the results of program evaluations to include questions of mission, role, investment strategies, and implementation. Distinguishing between "constructive" and "nonconstructive" mistakes focuses attention on those factors that shape the outcomes of investments. Sharing and reflecting upon mistakes has the potential to improve philanthropic capacities for anticipation, learning, and adaptation. Philanthropy must recognize the sometimes blurry lines between success and failure, constructive and nonconstructive mistakes, and philanthropic and nonprofit sector accountability. From The Foundation Review (Vol. 1, Issue 1). Read the entire issue at www.foundationreview.org #Non-ProfitsandFoundationsEvaluation