Although the origin of matter-antimatter asymmetry remains unknown,
continuing advances in theory and improved experimental limits have ruled out
some scenarios for baryogenesis, for example the sphaleron baryogenesis at the
electroweak phase transition in the standard model. At the same time, the
success of cosmological inflation and the prospects for discovering
supersymmetry at the LHC have put some other models in sharper focus. We review
the current state of our understanding of baryogenesis with the emphasis on
those scenarios that we consider most plausible.Comment: submitted to Reviews of Modern Physics; 38 pages; 9 figure