Do you envisage that a hundred or 200 years from now, people will be horrified by the idea that their ancestors ate meat and kept animals in deplorable conditions? I do. Do you have any systematic beliefs about whether we're likely to be making that kind of moral progress over time or not? I've written a book called the expanding circle. And what the title f that book takes aquote from the like nineteenth erty twentieth century historian w e h lecky,. who wrote the history of european morals from augustus, from rome onwards.