This is a book I should have liked. I picked it up enthusiastically when I read the jacket flaps, as it seemed to make an argument that I often find myself making -- more and more people decide matters on the basis of their preconceived biases with little regard for the facts. People don't like being troubled by facts when guesses, hunches, gossip, and drivel are so much easier and more amusing to digest.
As a college professor, I guess I qualify as an intellectual, although that word seems to have multiple surplus meanings, only some of which I consider an accurate reflection of who I am. But without question, I'm an advocate of evidence as a basis of reaching conclusions. I teach research methods to doctoral level students and write papers for scientific journals. I serve on editorial boards and have been a peer reviewer for public and private (nonprofit) research agencies. I take matters of evidence seriously.
So, why did I end up being disappointed in a book that seemingly advocates for the values I hold in such high esteem? Before answering that directly, let me say that there were parts of this book I did find informative and engaging. For example the discussion of how reason guided many of America's founders' view of the world, was handled skillfully (although I might not catch minor glitches because this isn't an area in which I have anything beyond a general level of knowledge). What disappointed me, however, was an apparent disregard for the role of evidence as the basis for other conclusions the author seems more than willing to treat as factual.
This may be best illustrated by a quote from p. 250, which closes a section discussing the impact of video media on young children: "Is more research required to tell us what is already known from medical studies of drugs and from millennia of educational effort -- that the impact of any substance or exposure, good or bad, is magnified by the length of exposure and that the effect is strongest on immature and therefore more malleable organisms?" So, here we have a book decrying unreason arguing that we shouldn't do research into a topic because received knowledge has taught us all we need to know about the matter. I consider the nature of inquiry to be ongoing, with further refinements in our understanding of various phenomena arising from continued scrutiny and questioning of prevailing beliefs. Jacoby's stance reflected in the quote is as fundamentally anti-intellectual as some of the ideas the author criticizes. First of all, video (of which I'm no particular fan, especially for the very young) is not a drug. Nor is medical research the most relevant, as we are considering behavioral and educational outcomes rather than health status per se in the discussion preceding the quoted statement. Millennia of educational effort, to use her term, have not helped us to perfect the process of education. Why should it be treated as having a higher yield in this particular instance? Her statement is an argument, not evidence. Also, it is factually incorrect to state that the impact of any substance or exposure is amplified by duration (although that will sometimes be the case). (Someone with a true respect for reason and the role of evidence as a basis for conclusions would shy away from the word "any" in a context such as this.) Furthermore, there are well documented (as well as intuitively obvious) counterexamples involving processes of habituation and adaptation, in which sensitivity to a stimulus is dialed down, not up, as a result of prolonged exposure. Our attention is channeled away from stimuli that are prolonged and relatively invariant. One summer, I worked next to an amusement park shooting gallery. I cringed and blinked with every shot fired for the first day or so. Then, I blinked but didn't cringe. Then I didn't blink. I'd habituated to the sound of a rifle being fired. The specifics aren't as important as the tone of the quoted statement. Nor is this particular dismissal of fact as a basis for conclusions the only instance in the book. (Nor, in fairness, is every conclusion unsupported.) But how can a claim such as this lodge itself in a treatise that targets unreason and denounces claims that lack a factual basis?
My sense was (and this is opinion on my part) that Jacoby is less comfortable with notions of evidence than with reason. Stated differently, her intellectual approach strikes me as more attuned to the humanities than the sciences or mathematics. Both reason and evidence are imperfect tools, of course. But there are differences. When the two clash, a scientist is inclined to be swayed by evidence, at least until better evidence comes along. In scholarly fields that have relied more heavily on reason than empirical evidence, this may be less true and I say that not as a criticism but merely an observation. When there is no definitive evidence, reason is likely to be an attractive and powerful alternative. While Jacoby praises the sciences as a means to establishing facts, she seems not to take a scientific approach to truth-seeking in some cases (like the one discussed above). Jacoby seems most comfortable in the intellectual milieu of the humanities, to oversimplify, perhaps.
Reason is good and we don't see enough of it. There, she and I would agree. But I hold evidence -- despite its sometimes transient nature -- as a higher approximation to truth. Of course, the two together are better than either alone. But Jacoby's casual attitude toward evidence really undermined her arguments for me. Had she taken the same stance and presented her ideas as opinion, with the benefit of supporting evidence where appropriate, I would have found little with which to quibble. But, in the context of asserting the intellectual laxity of Americans, her assertions, when not supported -- and occasionally contradicted -- by facts, really put me off.
To end on a positive note, one implicit goal of this book is to stimulate thought and discussion. It has succeeded. I'd rather read a book with which I disagree in part than one that fails to stimulate my thinking at all. This book did make me think, even if those thoughts were critical at times.