  Leibniz argues in numerous texts that it is parochial to think that human happiness is the standard whereby the goodness of worlds is to be judged. A more reasonable standard, according to Leibniz, would be the happiness of all sentient beings. But once we admit this, it may turn out that the amount of unhappiness in the created realm is quite small, given that for all we know, the sentient beings on Earth might constitute a very small percentage of the sentient beings created by God. Here Leibniz includes not only preternatural beings such as angels, but also the possibility of extraterrestrial rational beings [Theodicy 19 (H 134–5; G VI 113–4)].