Allan Gibbard
Notes
Allan Gibbard (born 1942), American philosopher, the principal modern defender of norm-expressivism: the view that to call something wrong is to express acceptance of a norm that forbids it, rather than to describe it. Wise Choices, Apt Feelings (1990) and Thinking How to Live (2003).
Wikipedia: https://en.wikipedia.org/wiki/Allan_Gibbard