https://www.goodreads.com/book/show/17707599-moral-tribes http://gen.lib.rus.ec/book/index.php?md5=08a6526a7a706c4ae5f5aa7543ffc702 Years ago when i used to study filosofy, i came across Joshua's website. On the site i found his phd thesis which i read. It is probably the best meta-ethics writing ive come across. He seems to have removed it from the site "available by request", however i still have it: Greene, J. D. (2002).