Christine M. Korsgaard was kind enough to answer a few questions of mine. Here's an excerpt:
ERICH: I have the impression that some utilitarian philosophers are having an outsize impact on the world. I am thinking, for example, of Singer, Toby Ord, William MacAskill and Hilary Greaves who have been instrumental in founding the Effective Altruism movement, which is having a large impact on global poverty and health, factory farming and so on. Is this a correct observation, do you think? If so, is it something about utilitarianism that spurs concrete action of this sort? And does Kantianism not?
CHRISTINE: The idea of doing a lot of good has a lot of appeal. The Effective Altruism movement also appeals because of its focus on good you can do right now, and as an individual, at least as long as someone else is doing the complicated work of organizing the charity and distributing the proceeds effectively. The problem of global poverty requires a political solution; charity, no matter how extensive, can never be more than a band-aid. But it does have immediate results. I think utilitarianism has an advantage over Kantianism in the public sphere because it is, at least superficially, much easier to understand, and the theoretical problems with it that I described before are hard to see.
I wonder what she thinks of EA's approach to animal advocacy. I know that many rights theorists object to welfare reform for allowing or promoting animal exploitation.
Also, intervening to promote wild animal welfare, too. There's been some writing in EA connecting wild animal welfare and rights:
Only seeing this now, but she does have sections in the book on thinking about species, habitat loss, eliminating predation and what she calls "creation ethics" among other things. I didn't get the feeling reading the book that she would be against welfare reform, but leafing through the pages now I couldn't find any passage that covers that topic explicitly. Thanks for the resources.