ABSTRACT
In his lucid and influential book, Ethics: Inventing Right and Wrong, John Mackie appealed to the existence of moral disagreement as one of two major sources of support for moral scepticism. The view that disagreement undermines claims to objectivity, however, is not independent of the way in which objectivity is conceived; one of the many salutary effects of Mackie's scepticism has been to stimulate explicit consideration of conceptions of objectivity. A distinctive conception of objectivity is suggested by Wittgenstein's later work and by certain of Davidson's writings. In this essay I shall sketch the way in which a view about practical reason may be in this sense objectivist, and shall go on to challenge the view that disagreement undermines an objectivism conceived along these lines.
