  This talk focuses on the role of light scalars in cosmology, both Nambu
Goldstone bosons and pseudo moduli. The former include QCD axions, which might
constitute the dark matter, and more general axions, which, under certain
conditions, might play the role of inflatons, implementing {\it natural
inflation}. The latter are the actors in (generalized) hybrid inflation. They
rather naturally yield large field inflation, even mimicking chaotic inflation
for suitable ranges of parameters.
