To create conditions in which competition will be as effective as possible, to supplement it where it cannot be made effective, to provide the services which, in the words of Adam Smith, “though they may be in the highest degree advantageous to a great society, are, however, of such a nature, that the profit could never repay the expense to any individual or small number of individuals”—these tasks provide, indeed, a wide and unquestioned field for state activity.
