Franz Brentano's remarks on theodicy presuppose both his ethical and his metaphysical views. But he does not tell us precisely how his ethics and his metaphysics are supposed to relate to one another. Indeed, the two appear to be irreconcilable. So I try to show how Brentano's solution to the problem of evil can disclose to us the relation between his ethics and his metaphysics. First I discuss those of his ethical principles which I take to be relevant to theodicy, (...) namely, that mental activity is indefeasibly good in itself, and that in practical decisions only one choice is good. Then I explain the relevant metaphysical doctrines, concerning the substance-accident relation and the principle of sufficient reason. I then raise the general problem of evil, as well as the specific problem for Brentano. And finally I explicate and defend his theodicy, both in terms of what he clearly states and in terms of what we can infer from his writings on what is good and evil, on what exists, and on the nature of God. (shrink)