2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105870I discuss the historical and conceptual roots of reasoning about the parameters of fundamental physics and cosmology based on selection effects. I argue concretely that such reasoning can and should be combined with arguments based on symmetry and dynamics; it supplements them, but does not replace them.10 pages, 5 figures. Summary talk at ``Expectations of a Final Theory'', Trinity College, Cambridge, September 2005. v2: date of earlier conference corrected (2003->2001)High Energy Physics - PhenomenologyAstrophysicsHigh Energy Physics - Theorytext