Full Idea
In her early work she defends the objectivity of moral norms, demonstrating their essential connection to facts about what is good for human beings.
Gist of Idea
Moral norms are objective, connected to facts about human goods
Source
report of Philippa Foot (Moral Beliefs [1959]) by John Hacker-Wright - Philippa Foot's Moral Thought Intro
Book Reference
Hacker-Wright,John: 'Philippa Foot's Moral Thought' [Bloomsbury 2013], p.5
A Reaction
I don't think she ever gave up this idea, which strikes me as thoroughly Aristotelian. The issue is how to understand what is good for us.