The President's Medal of the Geological Society of America, commissioned in 2007, will be conferred only on individuals, groups, or entities whose impact has profoundly enhanced the geoscience profession through (a) supporting and contributing to the Society; (b) advancing geosciences, enhancing professional growth, and/or promoting geosciences in service of humankind; or (c) significantly enlarging the range of scientific achievement for the growth of our profession.