In most colleges and universities nowadays we find a group of academics who are officially designated as together constituting a department of philosophy. They teach students who are officially designated as studying philosophy; they write books which are reviewed as being philosophy, which are listed under that head in publisher's catalogues, which are put into that category by librarians. Or they write for journals which are similarly categorized by librarians and which as often as not describe themselves, either in their title or their sub-title, as being devoted to philosophical problems.