In short, the lesson is clear: where there is scope for cooperation, there is in general need for cooperation. Independent decision making is likely to end in tears. Our actions must be directed towards ensuring cooperation and not conflict with Nature. We should make sensible use of Nature and avoid its over exploration. Over exploitation of common property re- sources (Nature) is the (- 1,0) type solution which is disastrous to the individual and to the group as a whole. Group interest cannot be furthered by independent pursuits of individual interests. Whether others graze a common pasture less or more, it is beneficial for the individual to graze as much as possible – such situations create need for ‘External Factors’ i.e. intervention from higher level like police to control traffic congestion and the U.N.O. to prevent extinction of animal and fi sh species used for food etc.