American Exceptionalism?

In a provocative article, Charles Murray, writing in the New Criterion, makes the argument that the increasingly divided society of today's America threatens the definition of American exceptionalism.  
What is American exceptionalism? 

Historically, Americans have been seen as different, even peculiar, to people around the world.1 I am thinking of qualities such as American industriousness—not just hard work, but the way that Americans have treated their work and their efforts to get ahead in life as a central expression of who they are. There is American neighborliness. Many cultures have traditions of generous hospitality to guests, but widespread voluntary mutual assistance among unrelated people who happen to live alongside each other has been rare. In the United States, it has been ubiquitous. I am thinking also of qualities such as American optimism, present even when there doesn’t seem to be any good reason for it; our striking lack of class envy; the assumption by most Americans that they are in control of their own destinies; and our famous naïveté in assuming the best of a random person that we come across. Finally, there is the most lovable of exceptional American qualities: our tradition of insisting that we are part of the middle class, even if we aren’t, and of interacting with our fellow citizens as if we were all middle class.

This last sentence is particularly important, and one that had been remarked upon from the earliest days of the Republic. Murray explains: 

Tocqueville, when explaining why the American system ensured that a despot could never successfully divide Americans against each other, wrote that “local freedom . . . perpetually brings men together, and forces them to help one another, in spite of the propensities which sever them. In the United States, the more opulent citizens take great care not to stand aloof from the people. On the contrary, they constantly keep on easy terms with the lower classes: they listen to them, they speak to them every day.”

The problem, however, is that over the past half century, people have grown increasingly isolated from each other - and no longer understand each other. The end result - a class-based society that is not so different from other "complex" societies.

When people are making decisions that affect the lives of many other people, the cultural isolation that has grown up around America’s new upper class can be disastrous. It is not a problem if truck drivers cannot empathize with the priorities of Yale law professors. It is a problem if Yale law professors, or producers of the nightly news, or CEOs of great corporations, or the President’s advisors, cannot empathize with the priorities of truck drivers.

The whole article is a must read.