Morality and Rationality: The Big Why
In the absence of any objective moral values, the most obvious haunting question is "Why be moral?" There is, as yet, no satisfactory answer to this question. Psychological observation, however, indicates that people do not cease to be moral just because they lack a philosophical justification to be moral. Most likely this is because we possess an inherent disposition towards moral behavior. A moral person cannot help being moral. A person who makes use of the argument 'Why be moral?' to do something contra-morality is probably already somewhat deficient in that moral disposition.
A question that almost appears analogous to this one is "Why be rational?" There is, as yet, no satisfactory answer to this question either. Rationality cannot justify itself using itself. Again, rational thinking seems to be an inherent disposition, something we cannot help doing. Of course, this disposition, like the moral disposition, is stronger in some than others, but those who have this disposition, they cannot stop being rational just because they can't justify rationality, because even as they ask the question 'Why be rational?' they are already committed to the notion of acting on the best reasons available. Rationality, in this sense, seems to have an instrinsic value for us. There seems to be something worthwhile about preferring truth over falsehood.
The two questions are almost identical, and yet it seems to me that people/philosophers are far less bothered by the question 'why be rational?' than they are by 'why be moral?'. Shouldn't the same answer suffice for morality too? That morality has an intrinsic value, that it is worthwhile to be moral for it's own sake.
Perhaps the justification for rationality and morality lies not in philosophy, but in psychology.