What if Morality is Left Entirely to Scientists?

While recently watching a lecture on Scientism for my course on Philosophy, Science, and Religion at the University of Edinburgh, a profound and unsettling question struck me: What would happen to human society if morality were left entirely in the hands of scientists?

Scientism is the philosophical belief that hard science is the only reliable path to truth. It claims that if something cannot be measured, weighed, observed under a microscope, or proven in a laboratory, it either does not exist or does not matter. Science is undeniably a magnificent tool. It has allowed us to map the human genome, split the atom, cure diseases, and send rovers to Mars. It is a brilliant lens for observing the mechanics of the physical universe.

But what happens when we ask a microscope to define right and wrong?

There is a fundamental limitation built into the very nature of the scientific method: Science can only tell us what is. It has absolutely no mechanism to tell us what ought to be. Even Albert Einstein, arguably the most brilliant scientific mind of the modern era, recognized this strict boundary when he wrote, "Science can only ascertain what is, but not what should be, and outside of its domain value judgments of all kinds remain necessary."

The renowned Christian apologist and mathematician John Lennox illustrates this limitation brilliantly. He notes: "Science can tell you that, if you add strychnine to someone's drink, it will kill them. But science cannot tell you whether or not it is morally right or wrong to put it into your grandmother's tea in order to get your hands on her property."

Consider a dark alley where a strong man overpowers a weak man, taking his belongings and leaving him injured. If we rely strictly on science to analyze the event, what do we get? A biologist can explain the evolutionary advantage of physical strength. A physicist can calculate the exact velocity and force of the blow. A neurologist can map the pain signals firing in the injured man's brain.

But no scientific instrument on earth can tell you that the act was evil. To declare that an act is morally wrong, you must step completely outside the boundaries of science. You must appeal to a transcendent moral law.

When a culture embraces Scientism and leaves morality to scientists, it inevitably reduces humanity to biology. And in the strictly biological world, the only governing law is the survival of the fittest. If we are nothing more than highly evolved animals—random collisions of atoms—then concepts like human rights, dignity, compassion for the weak, and justice are merely chemical illusions firing in our brains.

The prominent evolutionary biologist and atheist Richard Dawkins admitted exactly where this worldview leads in his book River Out of Eden: "The universe we observe has precisely the properties we should expect if there is, at bottom, no design, no purpose, no evil and no good, nothing but blind, pitiless indifference."

A universe of "blind, pitiless indifference" cannot produce a moral compass. This is not a hypothetical danger. History is scarred by regimes that replaced the law of God with cold, scientific utilitarianism. When human value is determined by biological utility rather than divine image, the results are always catastrophic. It leads to the justification of eugenics, the discarding of the unborn, the elderly, and the disabled, simply because they do not contribute to the "efficiency" of the species.

The Scriptures establish a radically different foundation. In Genesis 1:27, the Bible declares,

"So God created man in his own image, in the image of God created he him; male and female created he them."

Murder, theft, and cruelty are not wrong because they lower the survival rate of the species. They are wrong because they are an assault on an eternal being who carries the image of the Creator. Human dignity is not earned by biological fitness; it is endowed by the Lawgiver.

The Word of God beautifully maps the distinction between observing creation and understanding morality. Look at Psalm 19. The first six verses describe the physical universe:

"The heavens declare the glory of God; and the firmament sheweth his handywork" (Psalm 19:1).

That is the realm of science—observing the handiwork.

But David does not stop there. He knows that staring at the stars will not teach a man how to live righteously. In verse 7, the psalm shifts abruptly from the physical universe to the moral universe:

"The law of the LORD is perfect, converting the soul: the testimony of the LORD is sure, making wise the simple."

Science can observe the firmament, but only the Law of the Lord can convert the soul. A telescope can show you the heavens, but it cannot show you heaven.

We must celebrate science for what it is: the diligent study of God’s magnificent design. But we must never hand it the gavel of morality. Science makes a wonderful servant but a terrifying master. When we look for the definition of good and evil, we do not look to the laboratory. We look to the cross of Christ, where the ultimate standard of justice and the ultimate expression of love were permanently revealed to the world.