Tim Mulgan

What do we owe to our descendants? How do we balance their needs against our own? Tim Mulgan develops a new theory of our obligations to future generations, based on a new rule-consequentialist account of the morality of individual reproduction. He also brings together several different contemporary philosophical discussions, including the demands of morality and international justice. His aim is to produce a coherent, intuitively plausible moral theory that is not unreasonably demanding, even when extended to cover future people. While the book focuses on developing this new account, there are also substantial discussions of alternative views, especially contract-based accounts of intergenerational justice and competing forms of consequentialism.

An introductory ethics course serves many and often disparate ends, so much so that it may be difficult to find a theme or question that can tie these ends together in a coherent course narrative. This paper shares the author’s attempt to do so. In addition to high student interest in the subject, the topic of our obligation to future generations has the advantage of naturally leading a course through several systematic areas of philosophical importance. This topic lends itself not only to moral theory (e.g. the Nonidentity Problem), but also metaphysics (e.g. the metaphysics of personhood underpinning the Nonidentity Problem), political theory (e.g. utilitarian vs. Rawlsian answers to the question), and applied ethics (e.g. population policies). The author speaks to this topic’s adaptability to various levels of study (introductory, advanced, and graduate) and explains how the theme is taught at each level.

Our everyday notions of responsibility are often driven by our need to justify ourselves to specific others – especially those we harm, wrong, or otherwise affect. One challenge for contemporary ethics is to extend this interpersonal urgency to our relations with those future people who are harmed or affected by our actions. In this article, I explore our responsibility for climate change by imagining a possible ‘broken future’, damaged by the carbon emissions of previous generations, and then asking what its inhabitants might think of our current behaviour, our moral thinking, and our excuses. In particular, I will focus on a simplified scenario where present people can only avoid a broken future by sacrificing Rawlsian favourable conditions. Suppose we refuse to avoid a broken future, on the grounds that we cannot be expected to make such great sacrifices. If the broken future lacks favourable conditions, will its inhabitants accept our excuses? Will they hold us responsible for things we regard as excusable? If so, should we be guided by their judgements or by our own?