Wallace’s greatest “heresy” was to become, after his co-discovery of natural selection, “godfather” of the modern theory of intelligent design.
It’s helpful, as with his Third Way, to begin with a metaphor, in order to get an intuitive feel for the proof.
Our perspective is supported by a rigorous and elegant metaphysical framework, which began with Plato and particularly Aristotle.
The design we infer in nature is an insight we abstract from our senses, but the inference itself is acquired by our reason.
In my book, I argue that Thomas Aquinas’ teaching cannot be reconciled with theistic evolution.