We may think and experiment with this selective process as though it was easy and probably final. Nothing could be further from the reality. Even the best adjusted have moments of uncertainty and indecision about their occupational futures. The less adjusted spend a part of their lives looking around for a more attractive field. In every field, some of the best adjusted go as far as their interests and capacities carry them and then shift over into other occupations which, in turn, offer them more chances to employ their talents to greater advantage. In every field of human endeavor individuals come and go. They should stay where they seem to be useful and go when their usefulness is decreasing or coming to an end. Balance between status and change is as desirable for the individual as it is for the group. The decision to stay or go should remain open to the endless round of individuals who comprise any working team. The existence of such flexibility is limited, however, by the need to maintain a working force of interested, alert, eager individuals--skilled, adjusted and disciplined in group endeavor and achievement. We are describing the unending process of selection which goes on from hour to hour and day to day in any well ordered social group. Every group has its fields of endeavor, its goals and its scale of priorities. Individuals come and go. The group carries on. Excellence in group performance depends upon its competence in selecting, training and coordinating its endeavors. Every social group has its hard corps of trained and tested veterans. Also it has its problem of aging. The apprentice of yesterday becomes the experienced, skilled operator of today. Tomorrow brings retirement for those who have reached the age limit of service and who as a matter of group routine are replaced by newcomers. In the course of this cycle the directors of the group have their opportunity to improve the level of group efficiency by phasing out the old and incorporating the new. The range of capacity, from perception and facility to ineptitude and incompetence, holds for the new generation as it did for the old. The tone and performance level of each group is determined by the effectiveness of this selective process. At some point it becomes necessary to inquire into the biologic aspects of any social enterprise. We are doing our utmost to select and educate and train the fit. Are we producing potential fitness? Long experience has taught us that we cannot produce a silk purse from a sow's ear. Eugenics emerges as an important aspect of every long term group endeavor. Qualities and capacities are handed on from parent to offspring. Are we reproducing fitness or unfitness?