one tries to build ethics from scratch,
Wait, I didn't even noticed it. That is interesting! So if something to qualify as a philosophy or theory you need to try to build from scratch? I know people who would consider it hubris. Who would say that it is more like, you can amend and customize and improve on things that were handed to you by tradition, but you can never succeed at building from scratch.
So if something to qualify as a philosophy or theory you need to try to build from scratch?
Not necessarily, but that is certainly the currently fashionable approach. Also if you want to convince someone from a different culture, with a different set of assumptions, etc., this is the easiest way to go about doing it.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.