in this talk, i will give a survey of recent and upcoming results on various linear, semilinear, and quasilinear wave equations on a wide class of dynamical spacetimes in various even and odd spatial dimensions. these results include asymptotics for a wide range of nonlinearities. for many of these results, the spacetimes under consideration have only weak asymptotic flatness conditions and are allowed to be large perturbations of the minkowski spacetime, provided that an integrated local energy decay estimate holds. we explain the dichotomy between even- and odd-dimensional wave behaviour. part of this work is joint with mihai tohaneanu and jared wunsch.