While all aspects of the human condition are somehow related to politics, this plurality is specifically the condition-—not only the conditio sine qua non, but the conditio per quam—of all political life. Thus the language of the Romans, perhaps the most political people we have known, used the words "to live" and "to be among men" {inter homines esse) or "to die" and "to cease to be among men" {inter homines esse de- sinere) as synonyms. (...)
Plurality is the condition of human action because we are all the same, that is, human, in such a way that nobody is ever the same as anyone else who ever lived, lives, or will live.