The Unresolved Blazar Component of the Extragalactic Gamma Ray Background

We present a new theoretical estimate of the contribution of unresolved blazars to the extragalactic $\gamma$-ray background (EGB). We find that the Fermi source count data do not rule out a scenario in which the EGB is dominated by emission from unresolved blazars. The spectrum of unresolved FSRQs, when accounting for the energy-dependent effects of source confusion, could be consistent with the combined spectrum of both the low-energy EGRET EGB measurements between 50 and 200 MeV and the Fermi-LAT EGB measurements above 200 MeV.