This is a little bit difficult to answer because of the imprecision in the use of the terms “objective” and “subjective” when applied to ethics. Most of the time it is a way of distinguishing between two different schools of philosophy: moral relativists and moral objectivists. It even gets more confusing when trying to distinguish the category of morality that is being discussed. There are descriptive ethics, normative ethics, and metaethics.
Most of the time it is either normative ethics or metaethics that is being discussed. Here, it looks like Dr. Craig is claiming that normative ethical laws (what we should do or should not do) actually exist (moral realism) and exist universally - that is- they apply to everybody. On the other hand, moral relativists usually claim that there is no such thing as an ethical law that applies to everybody.
So, the claim here is that universal laws exist that direct what people should do and what they should not do. That is what is meant by the statement that something is objectively morally right or wrong.
In the midst of some pretty petty argument about what is right and wrong,
tdgesq has finally tried to be objective about the issue and to state some distinctions between subjective and objective morality and what constitutes both.
Earlier, MindOverMatter stated that objective morality is teleological. That’s true, but objective moral reasoning is also very much ontological. By its very nature it has to be, because the only truly objective moral system ever invented by humans, or given to man by God, according to what you wish to beleive, is Natural Law morality. Natural Law reasoning depends upon the ontological classification of the world we live in and the things in it, mankind included. Natural Law reasoning depends upon discerning and understanding the natures of things and of mankind itself. It is also decidedly epistemological in that the strength of Natural Law knowledge is always to be reinforced and understood through rational discourse. Some hold that, metaphysically, Natural Law morality is incompatible with atheism. I, for one, do not ascribe to that belief. Theologians have also stated this. The gap between the two can be filled in later, but, surely, the common ground of obejctive moral discourse can be arrived at first?
The objectivity of Natural Law morality is to be discerned through a rational enquiry which arives at universal truths pertaining to the nature of man and his place in the world. These universal truths must hold despite societal differences, personal predjudices and social customs. The resultant “morality” is that normative set of behaviours which are universal. Natural Law reasoning begins with the ontology of the world and then to the nature of man himself. This enquiry can be traced all the way back through Aristotle, Plato and to the Stoics. Roman Law was Natural Law and the legal and moral systems of our western societies are Natural Law systems. There is no doubt that they exist, because much of the development of the western hemisphere has been driven by them. Unfortunately, there has been a drift away from the objective rational enquiry and away from an ontological basis of discerning normative behaviour and it has been supplanted by teleological systems like Utilitarianism and Marxism.
How is moral objectivity arrived at? The same way any objective scientific principles are arrived at. Natural Law reasoning is a science, just as physics and chemistry are sciences. Verifiable results are arrived at and the objectivity of those results is because they exist independently of any one individual’s personal experience. Just like gravity does! We may not fully understand it, but we cannot deny that it exists. By recognising, knowing and understanding human nature, Natural Law morality can arrive at normative principles that universally shape and govern human behaviour. The truths arrived at must be justifiable, immutable and universal. If they are not, it does not dissprove their existence, but merely reflects on our understanding. Certain well known “inalieable rights” are said to be immutable, universal and justifiable. They are objective.
As MindOverMatter pointed out, “…*If there is no moral law, then your judgments are qualitatively the same as a judgment of taste.” *. According to Natural Law morality what constitutes ‘the good’ is what allows man to flourish according to his discerned nature. It is in virtue of our common human nature that the good for us is what it is. It seems de riguer amongst atheists, or amongst moral relativists that a denial of what constitutes human nature is a line of attack they take against objective moral law. Unfortunately, what constitutes normative human behaviour has been documented for so long, in so many contexts, that they are simply denying the rationality of humanity itself. That is the very antithesis of scientific objectivity.