The theory is more an amusement than anything, but as the article points out, it seems it led to a major impact with the exposition of CPT symmetry. It makes se

The theory is more an amusement than anything, but as the article points out, it seems it led to a major impact with the exposition of CPT symmetry. It makes sense if you know of Feynman's earlier work with Wheeler (http://en.wikipedia.org/wiki/Wheeler%E2%80%93Feynman_absorber_theory http://en.wikipedia.org/wiki/Wheeler%E2%80%93Feynman_absorbe...) which is actually a consistent theory of classical electrodynamics (i.e. half the electromagnetic interactions are "coming from the future").