The bizarre thing about the anthropocene is that never has humanity been more powerful and never have individual humans felt so powerless. This is because so much that drives the circumstances of the anthropocene is the aggregation of apparently negligible acts, often amplified by technology, rather than decisive acts by autonomous decision-makers.

People who go around saying that it is wrong to fly and to eat meat are not so much making appeals to us from within our shared morality, but engaging in something more like "persuasive definition." They want us to look at the world and ourselves in a different way. Someday these prohibitions against flying and eating meat may be written into our moral psychology, but it will only be after there are viable, widely shared alternatives that are beginning to be widely adopted.

People talk about the idea of special relationships, that is, the morality only really binds people who stand in some kind of contractual relationship with each other but in fact if you take that seriously as a criteria of when we have a moral relationship then it's hard to see why we would have moral obligations to strangers for example or people who live across the sea from us but yet, every decent person believes that we do.

I begin with human psychology and then see what we can say about ethics.

Environmental problems provoke challenges about what kind of world we want, how important we think it is if something is brought about by human action or by brute nature, what we think of the value of human life compared to that of other living things.

Acts are right in virtue of the goodness of their consequences.

We know the "great men" and a handful of heavily cited papers in our specialization. When there is a historical frame around a paper it's often a caricature that has become canonical.