Defining Evolution: Micro vs. Macroevolution

Today we’re continuing our conversation about theistic evolution and the theological implications of how we think about origins.

In this episode, Dr. JT Bridges helps us untangle what people actually mean when they say “evolution,” breaking down the difference between microevolution (small adaptations within a species) and macroevolution (the claim that one species can become another over long periods of time). We also talk about neodarwinism, intelligent design, and why so many debates about origins aren’t just about data. They’re about the philosophical assumptions we bring to the data.

One of the most eye-opening parts of this conversation is the idea that science doesn’t interpret itself. Two scientists can look at the same evidence and reach different conclusions—because interpretation requires philosophy, and many scientists simply aren’t trained to recognize when philosophical assumptions (like naturalism) are steering the outcome.

We also get into what’s actually at stake for Christians. If Darwinian macroevolution is taken as the full story of human origins, it raises serious questions about Adam and Eve, sin, and ultimately the coherence of the gospel message...especially the biblical teaching that sin entered the world through one man and that redemption comes through Christ.

This one is for the science nerds, the philosophy nerds, and anyone who’s ever felt overwhelmed by terms like “Big Bang,” “intelligent design,” “macro vs. micro,” and “philosophy of science.” We go deep in the weeds—but I think you’ll come away with a clearer framework for thinking biblically and carefully about origins.

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