 For a variety of reasons, many ethical thinkers have thought that justice cannot be based in sentiment but requires a more intellectually constructive rational(ist) basis, and in recent times this view of the matter seems to have been held, most influentially, by John Rawls in A Theory of Justice. Rawls makes clear his belief in the inadequacy of benevolence or sympathetic human sentiment in formulating an adequate conception of social justice. He says in particular that sentiment leaves unanswered or indeterminate various important issues of justice that a good theory of justice ought to be able to resolve.