Why? Is there some sort of legal case in which he is the judge, and has to disqualify himself because he has an opinion on the subject.
Where did I state that he had to disqualify himself or not state an opinion? Indeed I never said whether or not I agree or disagree with Mr. Fukuyama's positions. But that he appeared very recently at such an event certainly does color his arguments, and that is something that helps the reader put his remarks into context...
And I will disagree with Mr. Fukuyama in his general argument that the case for free markets/classical liberalism etc. has been won. Indeed, Lady Thatcher herself recently remarked something to the effect that it is an argument that is never ultimately won, but a battle which must continually be fought.