The Gruber team has uncovered a number of principles that seem to characterize the work of major scientists, like Darwin and Piaget. Such individuals engage in a wide and broad interconnected network of enterprises; exhibit a sense of purpose or will that permeates their entire network, giving direction to their daily and yearly activities, force the creation and exploitation of images of wide scope; and display a close and continuing affective tie to the elements, problems, or phenomenon that are being studied.