Ethics is prescriptive and can change behavior, but usually only at the margins.

Even if Bill McKibben were to become dictator, future generations would suffer because of the carbon we had already emitted.

I see a lot of individual action when it comes to environmental questions really as a form of politics as a way of communicating with political leaders, much in the same way that acts of civil disobedience during the civil rights' movement were really acts of political communication, trying to get laws changed rather than based on the thought that the individual action would really change the practices of segregation.

The problem is that for almost any feature of humanity that you can name, whether it's the ability to suffer, whether it's the capacity to reason, whether it's having lives that can go better or worse, there are at least some other non-human animals that have all of these features as well. So to exclude non-human animals from the range of moral concern but to include all humans, just seems morally arbitrary.

[This approach] displays the characteristic philosophical lust to vanquish the skeptic by arguing him out of his skepticism, without appeal to moral and political considerations or to the facts of everyday life. [...] But more often than not, if you give the skeptic everything he wants, then he will be successful in repulsing your attacks and terrorizing your position.

In the last few centuries we've managed to reduce how much we kill each other, we've learned some basic lessons about public health, and life is relatively good for more people than ever before.

The erosion of agency has consequences for our politics. As a result of all this, the fundamental ethical challenge of the anthropocene is the recovery of agency, or alternatively to come to terms with its loss and to understand how to go on.