The Last Human
If you were the last person on Earth, would it be wrong to destroy the natural world, to cut down every forest, extinguish every species, and drain every ocean, just because you felt like it?
This scenario, developed in environmental ethics, tests whether morality requires observers. If no one can be harmed and no one can object, is destruction still wrong? Your answer reveals whether you think value is something humans assign, or something that exists independently of us.
Why this question cuts deep
Most ethical frameworks center on harm to people. Utilitarianism asks about suffering and wellbeing. Kantian ethics asks about respect for rational beings. Rights-based theories ask who has claims against whom.
The Last Human cuts all those wires. There's no suffering, no rights-holders, no relationships. Just one person and a planet.
If your answer is "it wouldn't be wrong," you're a thoroughgoing anthropocentrist: value requires a human context to exist. If your answer is "it would be wrong," you're committed to something like intrinsic value in nature: worth that doesn't depend on anyone to recognize it.
The test cases people use
- Is it wrong to destroy a species of beetle no human has ever seen and no human would ever miss?
- Is it wrong to bulldoze a mountain that has stood for 300 million years?
- Is it wrong to kill the last tree if you're cold and you have a lighter?
Most people feel a pull toward "yes, wrong" even when they struggle to articulate why. Richard Routley, who introduced this scenario in 1973, thought that pull was philosophically significant.
What this reveals
The scenario was designed to argue for environmental ethics as a field, to show that standard ethical frameworks were too narrow to capture our actual moral intuitions about nature. Whether or not you agree with his conclusion, the question is a clean diagnostic for where you think value comes from.
The pivot
If it would be wrong, who or what is wronged? Naming the answer is harder than feeling it.