When euthanasia was first promoted to Western societies, its advocates promised strict limits, compassionate intentions, and robust safeguards. We were assured that only a tiny number of terminally ill patients, enduring unbearable suffering and making fully informed voluntary decisions, would ever qualify. Critics who warned of a slippery slope were dismissed as fearmongers. The expansion, we were told, would never happen.
Yet here we are.
A proposal published in the New England Journal of Medicine has reignited debate by questioning one of the oldest ethical principles in transplantation medicine: the Dead Donor Rule. The proposal explores whether, under tightly controlled conditions, organs could be retrieved from deeply sedated patients undergoing Medical Assistance in Dying (MAiD) before traditional criteria for death are met, in order to improve organ viability. Although this is not current Canadian law or practice, the fact that such proposals are now appearing in one of the world's leading medical journals illustrates how rapidly ethical boundaries continue to shift.
For opponents of euthanasia, this development is not shocking. It is predictable. Indeed, the only surprise is that it has taken this long. Once medicine accepts the principle that doctors may intentionally end innocent human life under certain circumstances, the ethical centre of gravity changes. The patient's life is no longer regarded as inviolable in every circumstance. Instead, it becomes something whose value may be balanced against other perceived goods: relief of suffering, respect for autonomy, efficient use of resources, or, now, potentially the opportunity to save several other lives through organ transplantation.
This is precisely why the Dead Donor Rule existed. It was not an arbitrary technical rule. It embodied a profound moral principle: doctors must never kill patients in order to obtain their organs. Organ donation was to occur only after death had independently occurred, never as its cause. Once that principle is questioned, an entirely different ethical landscape emerges.
The utilitarian argument is obvious. One patient has already decided to die. Several others desperately need healthy hearts, lungs, kidneys or livers. If removing organs a few minutes earlier dramatically improves transplant outcomes, why should society cling to an old ethical convention? Why allow perfectly healthy organs to deteriorate while waiting for circulation to cease?
From a purely consequentialist perspective, the arithmetic appears compelling. But medicine has never been based solely upon arithmetic. For over two thousand years the Hippocratic tradition has recognised that the physician's first obligation is not simply to maximise beneficial outcomes but to remain fundamentally committed to the welfare of the individual patient. Patients trust doctors because they believe the doctor is entirely on their side. Once the doctor begins weighing the interests of third parties against the life before them, that trust inevitably becomes more fragile.
This concern extends well beyond transplantation. Every expansion of euthanasia eligibility has been justified as an exceptional case. In Canada, Medical Assistance in Dying was initially restricted to competent adults whose deaths were reasonably foreseeable. The eligibility criteria later broadened to include many people whose deaths were not imminent, while further debates have continued over additional categories. Critics, including some disability advocates and ethicists, have argued that these changes illustrate how legal boundaries can expand over time.
Each individual change may appear modest. Collectively, they illustrate a deeper pattern. What begins as an extraordinary exception gradually becomes incorporated into ordinary medical practice. Once the underlying moral prohibition has been abandoned, subsequent expansions become arguments about efficiency, fairness, consistency or patient choice rather than about first principles.
This is the classic slippery slope. Its critics often misunderstand the concept. A slippery slope argument does not claim that every initial step must inevitably end at a particular destination. Rather, it argues that abandoning a foundational principle weakens the barriers preventing future extensions. History demonstrates that legal and ethical boundaries frequently evolve through incremental change rather than sudden revolution. That is exactly what many opponents predicted decades ago.
There is another concern that deserves attention. Organ transplantation is one of modern medicine's greatest achievements. Thousands of lives are saved every year because generous donors and their families consent to donation after death. Public confidence in that system is indispensable. If patients begin to wonder whether their doctors might unconsciously view them not solely as patients but also as potential organ sources, trust may erode. Even if safeguards remain rigorous, the perception of competing loyalties can itself become damaging.
The debate therefore reaches beyond Canada. Every society considering euthanasia eventually confronts the same fundamental question. Is medicine primarily about caring for vulnerable persons, or is it increasingly about managing competing social goods? Once intentional death becomes accepted as one therapeutic option, pressures inevitably arise to integrate that option with other beneficial medical practices.
That is why we continue to reject euthanasia altogether. Our objection is not merely theological, although many religious traditions affirm the sanctity of human life. Nor is it simply emotional. It is rooted in a concern about preserving the moral architecture of medicine itself. Some ethical lines exist not because crossing them is immediately catastrophic, but because they protect relationships of trust upon which civilised medicine depends.
Supporters of euthanasia will undoubtedly argue that voluntary consent and careful regulation can address these concerns. That debate will continue. But no one can now honestly claim that slippery slope warnings were simply irrational fantasies. When society accepts that doctors may intentionally end life, it should not be surprised that future generations begin asking whether those lives might also serve additional purposes. Once the first principle changes, every subsequent boundary becomes open to negotiation.
The destination may not have been inevitable. But the direction of travel was always entirely foreseeable.