Some philosophers believe in improvement: they think that the world is a better place than it used to be, and that future generations will fare even better. Others see decline: they claim that the condition of humanity has deteriorated and will continue to do so. Much ink has also been spilt over what explains these historical patterns. These two disagreements about the shape of history concern largely descriptive issues. But there is also a third, purely normative question that has been (...) neglected: is it better if a history features a pattern of improvement rather than deterioration, holding other things equal? This paper develops an answer to this normative question and explores some of its implications for matters related to the future of humanity. (shrink)

If a future AI system can enjoy far more well-being than a human per resource, what would be the best way to allocate resources between these future AI and our future descendants? It is obvious that on total utilitarianism, one should give everything to the AI. However, it turns out that every Welfarist axiology on the market also gives this same recommendation, at least if we assume consequentialism. Without resorting to non-consequentialist normative theories that suggest that we ought not always (...) create the world with the most value, or non-welfarist theories that tell us that the best world may not be the world with the most welfare, I propose a new theory that justifies giving some resources to humanity in the face of overwhelming AI well-being. I call this new theory, “Group Prioritarianism". (shrink)

Value conservatism is the thesis that there is a distinctive reason to preserve valuable things even when a (somewhat) more valuable thing might be created by their destruction. I offer an account that improves on the current literature in response to Cohen's “Rescuing Conservatism.” In short, we become psychologically attached to valuable things that make up part of our lives; the same holds true, interestingly, with things of relatively neutral value. Severing attachments is painful. This yields a reason to favor (...) an object that someone is attached to over an object that no one is attached to. But an analysis is only part of a theory of conservatism: we also need to know whether such conservatism is justified. I argue that Cohen's idea of “accepting the given” can be read to yield such a justification: it is valuable to maintain some moderate disposition to accept what one already has. This attachment‐based account of conservatism displays a number of attractive theoretical features, including accounting for the impulse to restore past valuables and providing a framework for judging conservatism excessive. (shrink)

This thesis consists of a series of papers in population ethics: a subfield of normative ethics concerned with the distinctive issues that arise in cases where our actions can affect the identities or number of people of who ever exist. Each paper can be read independently of the others. In Chapter 1, I present a dilemma for Archimedean views in population axiology: roughly, those views on which adding enough good lives to a population can make that population better than any (...) other. In Chapter 2, I extend Gustaf Arrhenius’s famous impossibility theorems in population axiology into the domain of choices under risk. My risky impossibility theorems dispense with the assumption that welfare levels are finitely fine-grained, and so tell against lexical views in population axiology. In Chapter 3, I present objections to critical-level and critical-range views in population axiology. I then sketch out what I call the ‘Imprecise Exchange Rates View’ and argue that it is an attractive alternative. In Chapter 4, I address critical-level and critical-range views again. This time, I note that they are vulnerable to objections from biographical identity: identity between lives. I suggest that these objections give us reason to reject critical-level and critical-range views and embrace the Total View. In Chapter 5, I argue that objections of the same form – objections from personal identity – tell against person-affecting views in population ethics. In Chapter 6, I draw out some counterintuitive implications of two recent complaints-based theories of the procreation asymmetry. (shrink)