To those who know and love Land Value Tax (LVT) the case for it seems self-explanatory, compelling and unanswerable. Yet strangely it all too often turns out to be a very hard sell. Present economic theory rests on false assumptions established so long ago that people have forgotten what they are. So the difficulty in explaining the immediate relevance of LVT is that one has to clarify first principles at the same time. This is not so easy. An audience waiting to hear how to revive the economy will not want to be asked to revise basic concepts they think they already know.