2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118516In this review, I give a brief summary of galaxy evolution processes in hierarchical cosmologies and of their relative importance at different masses, times, and environments. I remind the reader of the processes that are commonly included in modern semi-analytic models of galaxy formation, and I comment on recent results and open issues.8 pages, 4 figure, to appear in ASP Conference Series (Proceedings of the "Cosmic Frontiers" conference held in Durham, 31st July - 4th August 2006)Astrophysicstext