MOVING TO FRONT--COMMENTS NOW OPEN FOR READERS TO EXPLAIN THEIR CHOICE
So with 1200 votes since yesterday, here are the results.
1. None (21%; 252 votes)
2. Peter Singer (12%; 144 votes)
3. Alasdair MacIntyre (10%; 120 votes)
4. Martha Nussbaum (9%; 108 votes)
5. Elizabeth Anderson (7%; 84 votes)
6. Christine Korsgaard, Thomas Nagel, Joseph Raz, T.M. Scanlon (5% each; 60 votes each)
10. Harry Frankfurt, Amartya Sen, Charles Taylor (4% each; 48 votes each)
13. Raymond Geuss, Jurgen Habermas (3% each; 36 votes each)
I chose "none": I've read many of these philosophers with appreciation (and I have learned a lot from Nussbaum as a colleague), but none of them has had any impact on my moral/political views. Since today is a holiday in the U.S., I'll open this for comments tomorrow from readers about which answer they gave and why.