No one can be perfectly free till all are free; no one can be perfectly moral till all are moral; no one can be perfectly happy till all are happy.

We have learned to say that the good must be extended to all of society before it can be held secure by any one person or any one class. But we have not yet learned to add to that statement, that unless all [people] and all classes contribute to a good, we cannot even be sure that it is worth having.