The 45 Years of Muon g-2

In their first announcement of muon polarization Garwin, Lederman and Weinrich (1957) used the g-2 principle to put limits on the g-factor. The progress since then will be reviewed, the three experiments at CERN leading up to the new Brookhaven measurement to 0.7 ppm disagreeing with current predictions by 3.0 sigma. Recent advances in the theory (hadronic light-by-light, e⁺e^- and tau decay data) will be covered and a CERN film from 1967 will be shown.