What is Intuitionism and Why be an Intuitionist?

This paper examines the advantages and disadvantages of ethical intuitionism and is an extended critical discussion of an edited collection Rethinking Intutionism (ed.) Stratton-Lake (OUP) that has been much discussed. (My piece is one of the first discussions of it.) Along other matters, I argue for the original and fairly controversial claim that in order for intuitionism to hold water, we must allow that what is involved in full moral understanding can differ from person to person, rather than thinking that if a claim can be intuited rather than proved, everyone who intuits it understands it in the same way.