Full Idea
If the goodness of the world were to consist in people's fulfilling their obligations, it would by no means follow that one of my obligations was to bring it about that other people kept their obligations
Gist of Idea
We don't have a duty to ensure that others do their duty
Source
Bernard Williams (A Critique of Utilitarianism [1973], 2)
Book Reference
Smart,J./Williams,B.: 'Utilitarianism For and Against' [CUP 1978], p.89
A Reaction
If the maxim of my action is 'ensure that everyone does their duty', presumably that can be universalised. Nelson thought so. It just sounds like a hideous world of self-righteous interference.