I don’t believe the statement ‘suffering is bad’ is objective from a philosophical viewpoint (I may be saying that wrong). If Thomastoo were to say, I accept without proof that ‘suffering is bad,’ and use that to develop a moral system, I’d say fine.
Naturally, as a moral skeptic, I agree that “suffering is bad” isn’t some objective statement about the universe. Suffering is a vital part of the universe…pain serves the very useful function of directing our attention to areas that need to be fixed.
The thing is, for me, when we talk about how we behave, we’re no longer talking about
facts (which can be demonstrated via evidence), but
values (which are opinions about facts that cannot be demonstrated but are nonetheless part of the individual).
Where do values come from? Some of them come from biology: the empathetic “social animal” stuff I mentioned earlier. Some come from reason: rationally deciding the course of action best suited to cooperation and survival. Some come from tradition and training: we’ve spent so long as a species in a society with rules, and we’ve been trained in those rules, that we’ve “internalized” a lot of behavioral things that were rational decisions of our ancient ancestors. There are probably a lot of other sources, and I’m over-simplifying.
Our broad values – valuing orderly society, valuing not being killed, valuing not living in a society where stuff gets stolen – we are obviously going to share in common. Specific groups may have developed their own unique values, codes, and rules for social bonding and things like that (back in the day, different tribes had different rules, and today different religions have different rules, certain families might have their own traditions and values, etc).
Values can change over time, but the basic set of values I think are more or less set after a person emerges from childhood.
But at any rate, a value – like the value I place on living in an orderly society, or the value I place on not getting hurt or killed – isn’t a fact about the universe that I can demonstrate with evidence…it’s an opinion about facts – and not always a rational opinion – that is a part of who I am. Values not only can’t be “proven,” they don’t
have to be proven.
My personal take is that our behavioral decisions consist of weighing values against options in any given situation. Now since we start from a broad range of similar values, it is possible – given a shared value – to determine a rule that is more or less “objective” in terms of the group that shares that value.
But again…being an atheist doesn’t mean that you have to “prove” everything you think. It just means that you don’t believe in gods. You can believe in anything else for every irrational reason in the world: believe in absolute morality, psychic powers, souls, reincarnation, nutty new age stuff, whatever. The thing that defines an atheist is the rejection of the claim “gods exist.”