Creation is not the magical conjuration into existence of something that possesses all the attributes of the past without actually possessing a past. Surely that must be true, right? If it were, then there would be no such thing as free rational creatures, but only fictional characters summoned into existence in a preordained state of character.David Bentley Hart (in the comments here)
So, the issue of evil isn’t a utilitarian calculus, it’s a matter of the process whereby nothingness and every possibility of evil inherent in the conditions of finite freedom is conquered while actually bringing free spiritual natures into existence. But spirit can exist only under the conditions of those rational conditions that logically define it. To ask why God did not create spiritual beings already wholly divinized without any prior history in the ambiguities of sin—or of sin’s possibility—is to pose a question no more interesting or solvent than one of those village atheist’s dilemmas: can God create a square circle, or a rock he is unable to lift? A finite created spirit must have the structure of, precisely, the finite, the created, and spirit. It must have an actual absolute past in nonbeing and an absolute future in the divine infinity, and the continuous successive ordering of its existence out of the former and into the latter is what it is to be a spiritual creature. Every spiritual creature as spirit is a pure act of rational and free intentionality away from the utter poverty of nonbeing and toward infinite union with God. This “temporal” or “diastematic” structure is no less intrinsic to it than is its dynamic synthesis of essence and existence, or of stability and change. And that means that even the first stirring of a created spiritual nature’s existence must be a kind of free assent to existence on the part of the creature.
…Yet again, to say that evil is not necessary in itself does not mean that the possibility of evil–possibility, not necessity–is not present in the “venture” of creation. To say that a negative possibility is entailed in something is not to say that there is any intrinsic necessity for or positive value in the actualization of that possibility. When surgery is performed to remove a tumor, it is possible that there will be nerve damage. That does not mean that nerve damage is an intrinsically good or necessary aspect of surgery. The possibility of a falling back toward evil and nothingness is entailed in the creation of a free finite spiritual being, almost by definition. That does not mean that the actual falling back toward evil and nothingness is in itself a necessary or good “part of the journey.” But, in the course of God overcoming evil and nothingness in finite free spiritual creatures, it may happen. Happily, one would like to believe, God does not cease to conquer that evil, in this age or the age to come.