success, such judgments are most effective if they are made informally, privately, and confidentially.

A foundation's self-appraisal, however, may be greatly furthered if it is made rather thoroughly at intervals of, say, five to ten years. At such intervals the President and officers of the Foundation should attempt, quite informally and confidentially, to get the opinions of outside independent critics on the achievements of the Foundation, its shortcomings, and the new opportunities created by changed conditions. In the light of such advice, the President may propose to the Board of Trustees a totally new program or adjustments in the old one, and the Trustees should act on the proposal with the assistance of all the ideas that they can collect from appropriate sources. From time to time, the Foundation, being concerned with the role of other institutions in our society, must systematically appraise and revise its own, in order to continue to serve as an influence for a fresh, experimental approach to the improvement of human welfare.