Relative to sciences, measuring (or defining) progress in philosophy seems more complilcated. I also presume that more so than in sciences, what pushes a particular philosophical view/approach out of the mainstream may not be directly related to its merits as a theory but be due to other factors like sociopolitical ones (e.g. philosophy of religion). But of course, it could be that the nature of the problem is such that no meaningful progress can be made at this point in time (consciousness?)
And so here my question is whether progress in ethics has been made. Myself I imagine there has been some, because even if there are (and will always be) disagreements about values, we can still make progress by logically working out the consequences of adopting some, check how coherent the particular ethical stance is, etc.
And what about all the recent work on animal ethics, is that not progress forward from the philosophy of human rights and that too being progress itself? At the same time, I am aware that many religions and older philosophical systems hundreds of years ago too had their views about proper treatment of animals and people too and that it may be merely a reflection of our time and place (me in US in 2000s, for example) and not sign of philosophy's progress that this kind of work is being done now. In other words, progress in applied ethics and not other areas.
Anyhow, appreciate your views.