Wait, are you really claiming we should choose a moral system based on simplicity alone? And that a system of judging how to treat other people that "requires knowing lots of social science" is too complicated? I'd distrust any way of judging how to treat people that didn't require social science. As for calculations, I agree that we don't have very good ways to quantify other people's happiness and suffering (or even our own), but our best guess is better than throwing all the data out and going with arbitrary rules like commandments.
The categorical imperative is nice if you get to make the rules for everyone, but none of us do. Utilitarianism appeals to me because I believe I have worth and other people have worth, and I should do things that take that into account.
Wait, are you really claiming we should choose a moral system based on simplicity alone?
Jayson's point is that a moral system so complicated that you can't figure out whether a given action is moral isn't very useful.
In March 2009, Tyler Cowen (blog) interviewed Peter Singer about morality, giving, and how we can most improve the world. They are both thinkers I respect a lot, and I was excited to read their debate. Unfortunately the interview was available only as a video. I wanted a transcript, so I made one:
From there I pull back to saying "what does this mean about the problem of world poverty, given that there are, according to Unicef, ten million children dying of avoidable poverty-related causes every year?" We could save some of them, and probably it wouldn't cost us much more than the cost of an expensive pair of shoes if we find an effective aid agency that is doing something to combat the causes of world poverty, or perhaps to combat the deaths of children from simple conditions like diarrhea or measles, conditions that are not that hard to prevent or to cure. We could probably save a life for the cost of a pair of shoes. So why don't we? What's the problem here? Why do we think it's ok to live a comfortable, even luxurious, life while children are dying? In the book I explore various objections to that view, I don't find any of them really convincing. I look at some of the psychological barriers to giving, and I acknowledge that they are problems. And I consider also some of the objections to aid and questions raised by economists as to whether aid really works. In the end I come to a proposal by which I want to change the culture of giving.
The aim of the book in a sense is to get us to internalize the view that not to do anything for those living in poverty, when we are living in luxury and abundance, is ethically wrong, that it's not just not a nice thing to do but that a part of living an ethically decent life is at least to do something significant for the poor. The book ends with a chapter in which I propose a realistic standard, which I think most people in the affluent world could meet without great hardship. It involves giving 1% of your income if you're in the bottom 90% of US taxpayers, scaling up through 5% and 10% and even more as you get into the top 10%, the top 5%, the top 1% of US taxpayers. But at no point is the scale I'm proposing what I believe is an excessively burdensome one. I've set up a website, thelifeyoucansave.com that people can go to in order to publicly pledge that they will meet this scale, because I think if people will do it publicly, that in itself will encourage other people to do it and, hopefully, the idea will spread.
Immigration as an Anti-Poverty Program
I don't think we could have open borders; I don't think we could have unlimited immigration, but we're both sitting here in the United States and it hardly seems to me that we're at the breaking point. Immigrants would benefit much more: their wages would rise by a factor of twenty or more, and there would be perhaps some costs to us, but in a cost-benefit sense it seems far, far more effective than sending them money. Do you agree?
Changing Institutions: Greater Tax Break for True Charity
Millennium Villages Skepticism
Chinese Reforms
Military Intervention
Colonialism
Aid without stable government
Genetically modifying ourselves to be more moral
Problem areas in Utilitarianism
Is Utilitarianism independent?
Peter Singer: Jewish Moralist
What charities does Peter Singer give to?
Zero-Overhead Giving
Moral Intuitions
Improving the world through commerce
What makes Peter Singer happy?
Human and animal pleasures
Pescatarianism
(I also posted this on my blog.)