In the three major religions of the West, God is understood to be a being whose goodness, knowledge, and power are such that it is impossible for any being, including God himself, to have a greater degree of goodness, knowledge, and power. This book focuses on God's freedom and praiseworthiness in relation to his perfect goodness. Given his necessary perfections, if there is a best world for God to create he would have no choice other than to create it. For, as Leibniz tells us, 'to do less good than one could is to be lacking in wisdom or in goodness'. But if God could not do otherwise than create the best world, he created the world of necessity, not freely. And, if that is so, it may be argued that we have no reason to be thankful to God for creating us, since, as parts of the best possible world, God was simply unable to do anything other than create us---he created us of necessity, not freely. Moreover, we are confronted with the difficulty of having to believe that this world, with its Holocaust, and innumerable other evils, is the best that an infinitely powerful, infinitely good being could do in creating a world. Neither of these conclusions, taken by itself, seems at all plausible. Yet each conclusion appears to follow from the conception of God now dominant in the great religions of the West. William Rowe presents a detailed study of this important problem, both historically in the writings of Gottfried Leibniz, Samuel Clarke, Thomas Aquinas, and Jonathan Edwards, and in the contemporary philosophical literature devoted to the issue. Rowe argues that this problem is more serious than is commonly thought and may require some significant revision in contemporary thinking about the nature of God.