This is a follow on to my last forum "Is meat eating morally justifiable", to which raised more questioned than answered. https://www.debateart.com/forum/topics/5147-is-meat-eating-morally-justifiable
What is actually wrong about murder? There are four foreseeable answers which I will cover.
According to subjectivism, to say that something is wrong is to claim that you personally disapprove of it. The problems with this is that murders would technically be justified as they believed what they did was right.
According to inter-subjectivism, to say something is wrong is to claim your community disapproves of it. The problem with this is that communities may be wrong, as the Roman Catholics endorsed slavery, an unacceptable practice in todays world.
Emotivism (My personal go-to)
According to emotivism, to say something is wrong is not to make a claim at all. It is simply express personal disapproval. The problem with this is that it essentially eradicates the idea of morality as a whole.
Personally, I view this standpoint un-kindly, as it simply just postpones the mystery and is the "lazy way out" of what would be a fruitful discussion. To those who go to religion as an answer, I have one question. Are things wrong because they are wrong, or are they wrong because God says they are wrong.