Education

The Integrity of the Dialectic Must Be Preserved.

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We begin with a general lament by Max Boot.

Kids, don’t become like Donald Trump. Study history. The fact that so many Americans know so little about the past means that we as a society are vulnerable to demagogues. “Don’t know much about history” is a catchy song lyric but a dangerous motto for a democracy.

Historians may not want to admit it, but they bear some blame for the increasing irrelevance of their discipline. As historians Hal Brands and Francis Gavin argue in War on the Rocks, since the 1960s, history professors have retreated from public debate into their own esoteric pursuits. The push to emphasize “cultural, social and gender history,” and to pay “greater attention to the experiences of underrepresented and oppressed groups,” they write, has been a welcome corrective to an older historiography that focused almost entirely on powerful white men. But like many revolutions, this one has gone too far, leading to the neglect of political, diplomatic and military history — subjects that students need to study and, as enrollment figures indicate, students want to study but that universities perversely neglect. Historian Jill Lepore notes that we have ditched an outdated national narrative without creating a new one to take its place, leaving a vacuum to be filled by tribalists.

Put another way, democracy dies in a darkness brought about by, inter alia, writers at influential newspapers. Consider, for instance, the 1619 Project from New York’s Times, which somehow wrote about slavery and secession and emancipation without asking any history professors.

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The Inclusive Symbolism Crowds Out the Intellectual Substance.

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Good afternoon, dear reader. Jonathan Gewirtz and David Foster have invited me to participate in Chicago Boyz. I’m going to limit my presence here to occasional mini-dissertations on education, political economy, or transportation.

My first post is a cross-post from my primary web journal, Cold Spring Shops.

Inside Higher Ed’s Elin Johnson shares the bad news.  “Percentage of students who have met English and math benchmarks lowest in 15 years.”  The proximate cause appears to be a lack of preparation.

Almost 1.8 million students, or 52 percent of the 2019 graduating class, took the ACT.

Of the Class of 2019 who took the test, 37 percent met three of the four College Readiness Benchmarks, and 36 percent did not meet any. The latter number has grown over the past few years, reports ACT. Students who took the recommended high school core curriculum stayed steady in their readiness in English and math.

“As we’ve been pointing out for many years, taking the right courses in high school dramatically increases a student’s likelihood to be ready for success when they graduate,” said Marten Roorda, ACT CEO, in a press release. “Students who don’t take challenging courses — particularly those from underserved populations — may lack the self-confidence and ambition to do so, and social and emotional learning instruction can help them improve in those areas.”

I’d like to think that, oh, inculcating bourgeois habits and teaching the substance would work, but that’s not how the people whose salaries depend on them not seeing it respond.

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Retrotech — With a Future?

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Before there were electronic digital computers, there were mechanical analog computers. Although now obsolete for practical computation, these devices might actually have an useful future ahead of them–in education.

Mechanical analog computation (analog  means that calculation is done by measuring rather than by counting) goes back to the Greek  Antikythera mechanism  (65 BC), which was used to predict the positions of heavenly bodies. The modern era of analog computing began with the work done by James Thompson and his brother William (Lord Kelvin) in the 1870s. First, James Thompson created a mechanical device that performs the calculus function of  integration.

Lord Kelvin applied this device…along with other mechanisms for addition and trigonometric functions…to create a mechanical tide-prediction system. These tide predictors had a pretty good run: the invention was announced in 1876, and some of these systems were still in use in the early 1970s!

For those who haven’t studied calculus, integration can be thought of as a kind of continuous addition.  Imagine a hose with a fluctuating flow rate filling a pool: by integrating the rate of flow, you can calculate the volume of water added to the pool.

The basic concept of a mechanical integrator is shown below.

mechanical-integrator-modified

If the vertical shaft is turned at a constant rate, and the small wheel is moved in and out according to the changing value of some some variable Y, then the rotation of the horizontal shaft Z will represent the integral of Y with respect to time.  If Y is the rate of flow of the a hose, Z will be the total volume  added to the pool. If Y represents the acceleration of a vehicle, then the output shaft will give that vehicle’s speed at any moment.  Connect the output to the input of another integrator, and you will get the distance traveled.

Vannevar Bush, who would become Roosevelt’s science adviser during WWII, combined the integrator and other computing mechanisms to create a highly general mechanical computer, called a  differential analyzer. Completed in 1931, it was not restricted to a single application, but could be programmed–with a wrench and screwdriver to alter the connections–for a wide range of problems. Complex chains of calculation were possible, including the ability for a result at one stage to be fed back as input at an earlier stage–for example, the speed of a simulated vehicle affects its air resistance, which in turn influences its acceleration…which integrates back to its speed.

Other differential analyzers were built in the U.S.,  Norway, and Britain, and were used for applications including heat-flow analysis, electrical network stability analysis, soil-erosion studies, artillery firing table preparation, and studies of the loading and deflection of beams. It is rumored that a British analyzer was used in the planning for the bouncing-bomb attack on German hydroelectric dams during WWII. Differential analyzers appeared in several movies, including the 1951 film When Worlds Collide  (video clip). The ultimate in mechanical analog computation was the Rockefeller Differential Analyzer, a rather baroque (and very expensive) machine built in 1942. It was  decommissioned in 1954, on the belief that the future of calculation would belong to the electronic computer, and especially the electronic  digital  computer.   Following the decommissioning, the mathematician Warren Weaver wrote:

It seems rather a pity not to have around such a place as MIT a really impressive Analogue computer; for there is vividness and directness of meaning of the electrical and mechanical processes involved… which can hardly fail, I would think, to have a very considerable educational value. A Digital Electronic computer is bound to be a somewhat abstract affair, in which the actual computational processes are fairly deeply submerged.

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Journalists

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Financial Times recently had an article about a projected luxury dirigible.  Being an airship fan, I wish the venture success. I was struck, though, by a paragraph in the article contrasting the planned aircraft, called the Airlander, with the airships of the 1930s with their “flammable hydrogen fuels.”

Uh…no.  None of the airships of the 1930s used hydrogen as a fuel.  Some of them used hydrogen as a lifting gas, which is a totally different thing from the fuel consumed to power the craft forward. And most American airships didn’t use hydrogen for any purpose…the American airships that came to bad ends mostly did so as a result of weather-related structural failure…which point, one would have thought, might have been relevant to someone writing about the possible future of airships.

But airships are a pretty esoteric subject, after all, so maybe it’s unreasonable to expect a journalist to spend (or get his assistant to spend) half an hour actually learning something about whatever he is writing about.  So let’s talk about something that isn’t esoteric at all, but rather about as timely and important as it gets.  Energy.

I’ve noticed that in articles about energy storage…of which there have been a lot…the writer rarely seems to grasp that kilowatts are not the same thing as kilowatt-hours, and you can’t express the storage capacity of a battery or other storage system in kilowatts. It would be like stating the capacity of your car’s gas tank in horsepower.  (The same principle applies to megawatts and megawatt-hours, or gigawatts and gigawatt-hours)  Yet all the time, I see articles…not just in the general media but also in the business media…talking about the wonderfulness of a battery or whatever that can store 4 megawatts.

For example, here’s a Barrons article referring to a town which has installed batteries “that can hold two megawatts of power.”  Actually, the batteries at this facility can hold 3.9 megawatt-hours of energy…the 2 megawatts of power is about the rate at which energy can be added to or drawn from the system, and has nothing to say about the amount stored.  So if you withdraw power at 2 megawatts, you can do so for a little under 2 hours before the battery storage is exhausted. You need the megawatt-hour number to know that; “2 megawatts” tells you nothing about the storage capacity.

Turning now to television journalism:  I think Tucker Carlson is far superior to most TV commentators in terms of focusing on issues in some depth, rather than just obsessively circling in on whatever is hottest at the moment.  But when recently introducing a guest who was going to talk about a highly-questionable sale to China that was made during the Clinton administration, he said that sale had been of “machine parts.”  Actually, it was of machine tools, as the guest correctly explained.

Machine tools are one of the essential cornerstones of industry, and have been for a long time.  Shouldn’t a person who frequently writes and/or speaks about economic issues know what a machine tool is and why it matters?  Maybe I’m misinterpreting, but I think Tucker’s “machine parts” phrasing indicates that he has no such awareness.

Ben Rhodes, an Obama operative, said of the current generation of reporters:  “The average reporter we talk to is 27 years old, and their only reporting experience consists of being around political campaigns. That’s a sea change. They literally know nothing.”

No doubt true of a large number of those younger reporters who Rhodes manipulated while feeling contempt for. But there are journalists–older and younger–who do have a pretty good grasp of history, geography, and comparative political systems…some of them even have some education or reading in political philosophy.  But even among these, knowledge of technology–and by “technology” I do not mean just “computer stuff”–is pretty close to nonexistent.

And with the vastly increased influence of government over all aspects of the economy–and the even greater (much greater!) influence being sought by the current Democratic Party–such knowledge is pretty important.

Summer Rerun—Hoffer on Scribes and Bureaucrats

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Nothing is so unsettling to a social order as the presence of a mass of scribes without suitable employment and an acknowledged status…The explosive component in the contemporary scene is not the clamor of the masses but the self-righteous claims of a multitude of graduates from schools and universities. This army of scribes is clamoring for a society in which planning, regulation, and supervision are paramount and the prerogative of the educated. They hanker for the scribe’s golden age, for a return to something like the scribe-dominated societies of ancient Egypt, China, and the Europe of the Middle Ages. There is little doubt that the present trend in the new and renovated countries toward social regimentation stems partly from the need to create adequate employment for a large number of scribes…Obviously, a high ratio between the supervisory and the productive force spells economic inefficiency. Yet where social stability is an overriding need the economic waste involved in providing suitable positions for the educated might be an element of social efficiency.


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It has often been stated that a social order is likely to be stable so long as it gives scope to talent. Actually, it is the ability to give scope to the untalented that is most vital in maintaining social stability…For there is a tendency in the untalented to divert their energies from their own development into the management, manipulation, and probably frustration of others. They want to police, instruct, guide, and meddle. In an adequate society, the untalented should be able to acquire a sense of usefulness and of growth without interfering with the development of talent around them. This requires, first, an abundance of opportunities for purposeful action and self-advancement. Secondly, a wide diffusion of technical and social skills so that people will be able to work and manage their affairs with a minimum of tutelage. The scribe mentality is best neutralized by canalizing energies into purposeful and useful pursuits, and by raising the cultural level of the whole population so as to blur the dividing line between the educated and the uneducated…We do not know enough to suit a social pattern to the realization of all the creative potentialities inherent in a population. But we do know that a scribe-dominated society is not optimal for the full unfolding of the creative mind.

Eric Hoffer, The Ordeal of Change

(This essay was published in the late 1950s or early 1960s. Hoffer was talking here not principally about the United States but about what were then called “underdeveloped countries.”)

(2019 update)  Also, Francis Bacon noted four hundred years ago that  one reason for sedition and mutiny in any polity was breeding more scholars than preferment can take off…A modern translation of might be “graduating more PhDs than have any hope of getting tenure,” or, more generally, “graduating more people with degrees, and especially advanced degrees, than can use those degrees to pay for the cost of getting same.”

The extended Bacon quote:  “Therefore the multiplying of nobility, and other degrees of quality, in an over proportion to the common people, doth speedily bring a state to necessity; and so doth likewise an overgrown clergy; for they bring nothing to the stock; and in like manner, when more are bred scholars, than preferments can take off.”