 Foot (1978, 1984, 1985) argues that the difference between doing and allowing harm is at heart a difference in the agent’s relationship to a harmful sequence. We are able to pick out the sequence leading to a harmful upshot. Foot distinguishes between initiating (setting the harmful sequence going); sustaining (keeping the harmful sequence going when it would otherwise have stopped); enabling (removing some barrier which would have brought the harmful sequence to a halt) and forbearing to prevent (failing to take some action which would have brought the sequence to a halt). Initiating and sustaining both count as doing harm; enabling and forbearing to prevent are ways of merely allowing harm. Foot is clear that, in her view, the doing/allowing distinction is not the same as the action/omission distinction. “[Forbearing to prevent] requires an omission but there is no other general correlation between omission and allowing, commission and bringing about or doing. An actor who fails to turn up for a performance will generally spoil it rather than allow it to be spoiled” (Foot, 1978, 26) 