
The Higgs Boson, central to theoretical particle physics for more than 45 years, is currently the only "new" physics that has been discovered at the CERN LHC. There is intense interest in studying the Higgs boson to look for hints of any of the other new physics that has long been expected at the TeV scale. Such studies are hampered by the surprising difficulty of calculating the simplest Higgs observable (the total production cross section) to high precision. I will describe the developments that have recently permitted the calculation of the Higgs cross section at next-to-next-to-next-to-leading order (N^3LO).