"Persons and societies do not submit passively to surroundings and events. They make choices as to the places where they live and the activities in which they engage -- choices based on what they want to be, to do and to become. Furthermore, persons and societies often change their goals and ways; they can even retrace their steps and start in a new direction if they believe they are on a wrong course. Thus, whereas animal life is prisoner of biological evolution which is essentially irreversible, human life has the wonderful freedom of social evolution which is rapidly reversible and creative. Wherever human beings are concerned, trend is not destiny."
-- Rene Dubos