David Klinghoffer, writing at NRO, laments that no Jewish leader is articulating the pernicious evils of relativism like Joseph Ratzinger did in his homily the other day prior to being elected pope:
The belief that there "is a truth out there" is a decidedly un-postmodern notion. In the po-mo world truth has been relativized to one's cultural and social circumstances so that what is true for people in one cultural setting is not necessarily true for people in another. Perhaps the greatest danger of this is that if it applies to cultures it also applies to individuals. In other words, once we abandon the idea of "truth out there", i.e. objective truth, truth becomes intimately personal. It becomes a matter of whatever is true for me, whatever has purchase on my commitments.
When truth, particularly moral truth, has been subjectivized no one's truth is any better than anyone else's because there is no longer a standard to which we can compare them. When no one's moral truth is better than any one else's everyone's morality is equally "valid". At that point we have moral paralysis. All moral disputes reduce to matters of personal taste or preference. Nobody's wrong if everybody's right. If that is so, however, then none of us can say that the holocaust was evil, or that rape, or child molestation, or chattel slavery are evil. The most we can say about those horrors is that we don't like them.
When morality is subjectivized there is no reason why we should care about society, or virtue, or the well-being of others. There is no reason why we shouldn't adopt a thoroughgoing egoism, an ethic of putting our own interests first all the time. And if egoism is a legitimate way to live one's life then so too is the philosophy of might makes right. If I can impose my will on another to achieve my interests there is no moral reason why I should not do so even if my doing so brings harm to the other person.
In other words, the relativization of truth leads to a moral hell, a war of every man against every man, a world where we can trust others only to do what's in their own interests. That's the world we'll create if secularism ever prevails completely in this country. Indeed, it's the world we find today in much of our social experience. Pope Benedict XVI obviously sees this. It's a shame that more religious leaders in more Christian and Jewish churches and synagogues don't.