None of us are rational economic men as we're supposed to be portrayed in economic theory where mixes of passions, of desires, of moral principles, of self-deception, of altruism, of concern of others, of concerns for ourselves and an interest in our bank accounts. And social policies have to be responsive to the complexity of who we are as people or else, like the war on drugs, they're simply going to fail.

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

Climate change is not going to be prevented. It's not even going to be mitigated to the degree a rational person would want. As a result we're going to have to live with climate change and try to reduce the extent and rate of change as much as possible. This is not an inspiring or sexy project.

I worry that even well-intentioned attempts to "improve nature" (say by reducing suffering) will make things worse even in their own terms.

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.

If you're interested in doing something about climate change as we all should be, all of us who care about future people and creatures that will inhabit this world. Then buying a Prius is a good thing but an even better thing would be to be on the streets demanding urgent action from the United States' Congress.

I think, questions about what it means to respect nature become very important because just as in human society, for example, part of what it is for me to live a good life as a human being in a human society is to have respect for others around me. Now, that respect, to some extent, can be thought of as being grounded in the rights and interest of others but it also has to do with the stance that I take in the world and what it is that provides meaning and significance in my own life and I think there are similar ideas of respect for nature that apply as well.