Female animals defending their young are notoriously ferocious and lack the playful delight in combat which characterizes the mock combats of males o… - Margaret Mead

In 1946, a Macy Foundation interdisciplinary conference was organized to use the model provided by "feedback systems," honorifically referred to in earlier conferences as "teleological mechanisms," and later as "cybernetics," with the expectation that this model would provide a group of sciences with useful mathematical tools and, simultaneously, would serve as a form of cross-disciplinary communication. Out of the deliberations of this group came a whole series of fruitful developments of a very high order. Kurt Lewin (who died in 1947) took away from the first meeting the term "feedback". He suggested ways in which group processes, which he and his students were studying in a highly disciplined, rigorous way, could be improved by a "feedback process," as when, for example, a group was periodically given a report on the success or failure of its particular operations.

Today our approaches to children are fragmented and partial. Those who care for well children know little of children who are sick. The deep knowledge that comes from the intensive attempt to cure is separated from the knowledge of those whose main task is to teach.

One of the oldest human needs is having someone to wonder where you are when you don't come home at night.