A brain is a society of very small, simple modules that cannot be said to be thinking, that are not smart in themselves. But when you have a network of them together, out of that arises a kind of smartness.
Look at our Lords disciples. One denied Him; one doubted Him; one betrayed Him. If our Lord couldn't have perfection, how are you going to have it in city government?
Women and minorities have excelled beautifully in comedy, but very few women are the lead in a drama.