In the popular meaning, the common good describes a specific "good" that is shared and beneficial for all (or most) members of a given community.However there is no strict definition of the common good for each situation. The good that is common between person A and person B may not be the same as between person A and person C. Thus the common good can often change, although there are some things — such as the basic requirements for staying alive: food, water, and shelter — that are always good for all people. (excerpt from Wikipedia, the free encyclopedia).
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