Philosophy
Climate Justice and Intergenerational Equity in Political Theory
Quick fact
Even if all greenhouse gas emissions stopped today, the planet would continue warming for decades—meaning every ton we emit now is a legacy that future generations cannot refuse.
Why this is interesting
You save for your grandchildren, but why should you sacrifice for people you'll never meet? Climate change forces us to decide: is it fair to let the future pay for our convenience?
Read the full explanation
Understanding Climate Justice and Intergenerational Equity in Political Theory
Think of the Earth as a shared garden that all generations must live in. Any gardener who plants only today's crops and depletes the soil for tomorrow is acting unjustly, even if he never sees the future gardeners. Climate justice applies this intuition to our carbon emissions: we are borrowing the stability of the climate system from future inhabitants, and failing to repay it with sufficient mitigation is an act of intergenerational injustice. A foundational idea is that every person, regardless of when they are born, has equal moral worth. This leads to the principle of intergenerational equity: no generation is justified in leaving the planet in a worse condition than it found it, without compensation. In practice, this means we have a duty to limit emissions so that the option for a good life remains open for those who come after us. Political theory asks hard questions here: What obligations do we have to people who do not yet exist? How do we weigh their interests when they have no vote or voice in today's decisions? The answers shape policy choices like carbon taxes, emission targets, and investment in renewable energy.
A deeper explanation
The philosophical reason behind intergenerational equity is distributive justice across time. Just as we demand fairness among people alive today, we must extend that fairness to future generations. The core mechanism is the 'intergenerational welfare account': we are allowed to use resources as long as we compensate for the losses we impose on the future. However, achieving equity is complicated by the 'non-identity problem'. This is the observation that our choices about emissions will change which individuals exist in the future. If we reduce emissions, the specific people born later will be different from those who would have been born under a high-emission scenario. As a result, we cannot say that we have harmed specific future individuals, because those individuals would not exist without our past emissions. This challenges simple harm-based arguments. A solution used by theorists is to think about the quality of life that any future generation will have, rather than the identity of its members. The ethical goal is not to protect particular rights of particular unborn people, but to ensure that the range of opportunities open to future people is not unjustly restricted. This leads to the precautionary principle: when facing potential catastrophic harms, we should act to avoid them, even under uncertainty. This principle also confronts economic discounting. In economics, future benefits and costs are often 'discounted' to present value, meaning that a cost in 2100 is seen as less important than the same cost today. But intergenerational equity demands that we treat the welfare of all generations equally, and so a far-future cost should carry full weight. This clash between ethical equity and economic discounting is central to policy debates, such as the Stern Review versus standard cost-benefit analyses. Thus, climate justice in political theory is not just about 'being nice to the future'—it is an argument that we hold the Earth in trust, and that justice requires us to be good custodians of that trust, even for generations we will never meet.