Her work in the 1950s and 1960s may be seen as an attempt to make Aristotelian ethical theory adaptable to a contemporary world view, and so able to compete with such theories as modern deontological and utilitarian ethics.
Some of her work was crucial to the re-emergence of normative ethics within analytic philosophy, especially her critique of consequentialism and of non-cognitivism.
A familiar example is the continuing discussion of an example of hers referred to as the trolley problem.
Foot's approach was influenced by the later work of Wittgenstein, although she rarely dealt explicitly with materials treated by him.
She was a granddaughter of American President Grover Cleveland.