We introduce the concept of Baire Ergodicity and Ergodic Formalism. We use
them to study topological and statistical attractors, in particular to
establish the existence and finiteness of such attractors. We give applications
for maps of the interval, non uniformly expanding maps, partially hyperbolic
systems, strongly transitive dynamics and skew-products. In dynamical systems
with abundance of historic behavior (and this includes all systems with some
hyperbolicity, in particular, Axiom A systems), we cannot use an invariant
probability to control the asymptotic topological/statistical behavior of a
generic orbit. However, the results presented here can also be applied in this
context, contributing to the study of generic orbits of systems with abundance
of historic behavior.Comment: 37 pages, 4 figure