In his new foreword to this edition, Hilary Putnam forcefully rejects these nativist claims.

Counterfactuals is David Lewis' forceful presentation of and sustained argument for a particular view about propositions which express contrary to fact conditionals, including his famous defense of realism about possible worlds and his theory of laws of nature.

The purpose of this note is to dispute Michael Ayers' claim that "there is no special problem of subjunctive conditionals".