The lecture opens the Justice course by deliberately avoiding definitions of “justice” or “rights” and instead pulling the audience into a set of high-pressure moral dilemmas. The point is simple but uncomfortable: most of us already carry strong moral beliefs, yet we rarely understand the reasoning behind them until someone forces us to choose under stress. The class begins with the trolley problem because it acts like a psychological mirror—whatever answer you give, it reveals what you think matters most: outcomes, intentions, duties, or human dignity.
In the first scenario, you are the trolley driver. Five workers are on the main track, and you can pull a lever to divert the trolley to a side track where it will kill one worker instead. A large majority chooses to pull the lever. On the surface, it feels like a clean calculation: one death is better than five. The lecture uses this agreement to introduce the appeal of consequence-based thinking—morality as an optimization problem where the best choice is the one that produces the least total harm (or the most total good).
But the lecture doesn’t let the class rest in that confidence. It immediately presents a second scenario that keeps the numbers the same while changing the method: you are now a bystander on a bridge, and the only way to stop the trolley from killing five is to push a very large man onto the track. His death will stop the trolley and save the five. Most people refuse to push him. That single shift—from lever to human body—creates a moral earthquake. If the only thing that mattered was the number of lives saved, the answers should match. But they don’t.
The lecture uses this gap to expose a deeper truth: moral judgment isn’t only about arithmetic. People seem to care about whether harm is intended versus merely foreseen, whether the victim is being used as a tool, whether the act is direct and personal, and whether the action crosses a boundary that feels fundamentally wrong even when the outcome is “better.” This is where the course’s central tension is introduced: one moral framework evaluates actions by results (consequences), while another insists that certain actions violate duties and rights so deeply that no good outcome can justify them. The first part ends by making the audience feel what the course is really about: justice is not a comfortable theory—it’s the struggle to explain why we draw moral lines where we do, and whether those lines can survive serious challenges.
Part 2
After the trolley problem reveals the conflict between outcome-focused reasoning and rule/duty-focused reasoning, the lecture expands the experiment into medical cases—because healthcare decisions resemble trolley problems in real life: limited resources, urgent stakes, and painful tradeoffs. The goal is to show that the philosophical clash isn’t confined to “hypothetical games.” It appears anywhere humans must choose who receives help, who bears risk, and what counts as acceptable sacrifice.
The first medical example is emergency-room triage. A doctor can either save one severely injured patient or save five moderately injured patients. Many people choose the five again, and the reasoning is familiar: it feels compassionate to maximize lives saved. The lecture highlights how natural this logic becomes when resources are scarce. In many real situations—disasters, war zones, overwhelmed hospitals—triage is unavoidable, and consequence-based thinking feels like common sense rather than cold calculation.
But then comes the scenario designed to break that “common sense”: the transplant surgeon. Suppose five patients will die without organ transplants, and one healthy person’s organs could save all five. Should the surgeon kill the healthy person to harvest organs? Almost everyone says no. The lecture uses this reaction to show that even people who are willing to sacrifice one to save five in other scenarios suddenly discover a moral boundary they refuse to cross: deliberate murder of an innocent person as a means to an end.
This is the turning point where the lecture sharpens the philosophical vocabulary. Consequence-focused morality (often associated with utilitarian thinking) says the right action is the one that produces the greatest overall good—often framed as maximizing welfare or happiness and minimizing suffering. But the transplant case triggers a competing moral instinct: that individuals have rights that cannot be traded away like numbers on a scoreboard, and that intentionally killing an innocent person is wrong even if it produces a “better” total outcome.
The lecture encourages the audience to notice what their own minds are doing. Many people aren’t purely “utilitarian” or purely “categorical.” They shift depending on context. They accept tradeoffs in triage because no one is being used as a tool; the doctor is choosing whom to save, not whom to kill. They reject organ harvesting because the act transforms a person into a resource. That difference suggests that morality may depend not only on results but also on the type of action, the relationship between agent and victim, and whether the victim is treated as an end in themselves or as a mere instrument.
Part 2 also quietly sets up why the course will later study philosophers like Bentham and Kant. Bentham represents a systematic version of outcome-based reasoning—morality as measurable utility. Kant represents a systematic version of duty-based reasoning—morality as respect for persons and universal moral rules. The lecture doesn’t resolve the conflict yet; it makes sure the audience feels the force of both sides. If we commit fully to maximizing outcomes, we risk approving acts that feel monstrous. If we commit fully to absolute prohibitions, we risk refusing actions that could prevent enormous suffering. Justice lives in that collision, and the course will spend weeks testing whether either framework can handle the hardest cases without contradicting itself.
Part 3
The lecture then shifts from thought experiments to a real legal case to prove that these dilemmas are not academic toys: Queen v. Dudley and Stephens. The facts are extreme but real. After a shipwreck, four sailors drift without food or water. As desperation peaks, Dudley and Stephens kill the cabin boy, Richard Parker, and cannibalize him to survive. When they are rescued, they are charged with murder. Their defense is necessity: they claim killing the boy was required, because otherwise all might have died.
This case forces the course’s central conflict into the courtroom. From a consequence-based viewpoint, someone might argue: if the killing saved multiple lives, it could be defended as the lesser evil. But from a categorical viewpoint, murder remains murder—even in desperation—and necessity cannot transform an innocent person into expendable material. The lecture uses the class debate to reveal how quickly “survival” becomes morally dangerous if it’s treated as an all-purpose excuse. If necessity can justify murder, then the law risks collapsing into a brutal logic where the strongest decide what counts as “necessary.”
The discussion then drills into two issues that sound like they might solve the moral problem—but may actually deepen it: fair procedure and consent. Some students raise the idea of a lottery. If death is unavoidable, wouldn’t it be “fair” to draw lots so everyone has an equal chance of sacrifice? The lecture asks whether fairness can sanitize an act that still looks like intentional killing. Does procedure change morality, or does it merely make injustice feel organized?
Consent creates an even sharper edge. Could the cabin boy’s consent have made it permissible? The lecture pushes back by highlighting the problem of coercion under extreme conditions. When starvation is the backdrop, “consent” may not be free in any meaningful sense. And even if consent were genuine, does that make it morally acceptable for others to kill you? The lecture uses these questions to show that justice cannot be reduced to “good outcomes” or “fair rules” alone; it also involves the deeper meaning of human dignity, agency, and the limits of what can be done to a person—by individuals or by systems.
Finally, Part 3 ties everything back to the purpose and structure of the course. The trolley problem, the hospital cases, and Dudley and Stephens are meant to build a habit: taking moral intuitions seriously but not treating them as final. The course will examine utilitarianism (Bentham and Mill) and duty-based ethics (Kant), then apply them to modern political controversies—equality, speech, conscription, rights, and the role of government. The lecture warns that philosophy is personally and politically risky because it destabilizes comfortable beliefs. It also addresses skepticism—the temptation to say “these problems have no answers”—and rejects it as an excuse for disengagement, because moral choices are unavoidable in real life. Whether we admit it or not, we are always choosing principles. The course simply demands that we choose them consciously, defend them with reasons, and face what those reasons imply.