  I examine the status of inflationary cosmology in light of the first-year
data from the WMAP satellite, focusing on the simplest models of inflation:
those driven by a single scalar field. The WMAP observation of the Cosmic
Microwave Background is the first unified, self-consistent data set capable of
putting meaningful constraints on the inflationary parameter space. WMAP
provides significant support for the inflationary paradigm in general, and
single-field slow-roll inflation models provide a good fit to existing
observational constraints.
