Although Dr. Welty discusses various objections to his theodicy, he regrettably omits any mention its greatest challenge: the widespread conviction that it has been decisively disproven by science.
Mainstream science has no place for the Biblical Adam & Eve in an idyllic Garden of Eden. Allegedly, humans evolved, via a cruel quest for survival, in a group of at least several thousand; there never were two humans from whom all other humans descend.
Even worse, fossils indicating natural evil (animal suffering from predation, disease, etc.) are allegedly dated millions of years older than the earliest humans, in blatant contrast with the notion that natural evil was caused by Adam's Fall.
Clearly, the view that natural evil comes only after Adam's Fall entails rejecting mainstream fossil dates, and thus essentially embracing Young Earth Creationism (YEC).
Unhappily, the bulk of Christian Academia has largely accepted mainstream science, and hence disdains YEC. Some Christian scholars do uphold the traditional natural evil theodicy, while at the same time explicitly rejecting YEC, seemingly unaware of any inconsistency (e.g., Wayne Grudem, Douglas Groothuis). Most, however, embrace alternative theodicies that are more in tune with mainstream science.
That raises a number of issues:
1. In historical theology, what phenomena did Reformed theologians classify as natural evils? Natural evil is a very broad category, with many examples.
i) Wildfires are a natural evil, caused by lightning. Does Byl think there was no lightning or fire before the Fall?
Campfires can start a wildfire. Was everything fireproof before the Fall?
ii) Flooding is classified as a natural evil. Does that mean the Nile river couldn't/didn't flood before the Fall? The annual flooding of the Nile river is beneficial to Egyptian farmers.
iii) If a tsunami sweeps over an island that has no fauna, is that a natural evil? It doesn't kill anything. Is a tsunami intrinsically a natural evil, or only in conjunction with other factors?
iv) An avalanche is classified as a natural disaster. Were avalanches impossible before the Fall? If you have mountains and precipitation, that produces snowpacks that produce avalanches.
2. This all goes to the ambiguity of "natural evil". "Natural evil" is a term of art. Many natural evils are natural goods. They are necessary to maintain the balance of nature. They are only evil if a human being is in the wrong place at the wrong time.
3. It's not as if the Bible has a list of labeled natural evils. Is it a biblical presupposition that animal death is evil? Was the sacrificial system evil?
4. I've always thought the YEC claim that natural evil must be a result of the Fall is philosophically and exegetically naive:
i) YECs assume that natural evil is incompatible with the creation as originally "good" or "very good". That, however, is not an exegetical conclusion. Gen 1 doesn't define the goodness of creation in contrast to so-called natural evil. It doesn't speak to that issue one way or the other.
ii) The standard objection to animal suffering is not that it happened before the Fall. What atheist frames the objection that way? If we say animal suffering is a postlapsarian development, that's irrelevant to the argument from animal suffering. Atheists will say animal suffering is incompatible with divine benevolence or wisdom regardless of whether that is deemed to be a prelapsarian or postlapsarian phenomenon. God is still complicit in predation, parasitism, and disease even if that's indexed to the Fall. So it's a failed theodicy.
iii) In addition, Byl is a Calvinist, so he believes that God predestined all natural (and moral evils) and implements his blueprint via meticulous providence.
iv) Even within an Edenic setting, it doesn't follow that there was no predation or animal death. Although the animals are tame in relation to Adam and Eve, that carries no presumption that they are nonviolent in relation to other animals.
v) Apropos (iv), Gen 2-3 implies animal mortality, for the tree of life is reserved for humans. And it only existed in the garden, not outside the garden.
5. YEC, if true, entails the falsity of the evolutionary narrative. However, the converse doesn't follow. The falsity of YEC doesn't entail the evolutionary narrative.
6. Allowing for natural evils before the Fall doesn't mean innocent Adam and Eve were exposed to natural evils. God could providentially shield them from natural evils.
7. Byl is both a geocentrist as well as a young-earth creationist. From his viewpoint, they share a common hermeneutic. The same hermeneutic yields young-earth creationism and geocentrism.
The dilemma that generates is that I don't see how he can draw a hermeneutical line between geocentrism and flat-earthism. He's scornful of Enns doe arguing that Scripture teaches a three-story universe, but it sure looks to me like the same hermeneutic that yields a geocentric cosmography yields a flat-earth cosmography as well. And the reasoning is reversible. They rise and fall together.