U(2,2) symmetry as a common basis for quantum theory and geometrodynamics

We formulated some criticisms of the Dirac equation and its Clifford-algebraic philosophy; in particular, we show that, within a general-relativistic context, they seem to contain hidden action-at-distance concepts. We suggest a new model based on the four-component Klein-Gordon equation locally invariant under the Lr(2,2) gauge group. The usual Dirac equation is then obtained as a certain approximation. The geometrodynamical sector shows reasonable correspondence with general relativity.