Theoretical Summary: 1999 Electroweak Session of the Rencontres de Moriond

The following aspects of the electroweak interactions are discussed, based on presentations here: the status of the Standard Model, CP violation, neutrino masses and oscillations, supersymmetry and models in extra dimensions, and future projects. Particular emphasis is laid on the tests of CP and CPT by KTeV and CPLEAR, on the problems of degenerate neutrinos, on supersymmetric dark matter, on future long-baseline neutrino beams, and on muon storage rings that may be used as neutrino factories.