Mark Twain once observed that no one would try to play a fiddle in public without some prior instruction in the instrument, but no one had such hesitation when it came to writing.

Clearly, many candidates these days think you can run for president without any political experience or with precious little. The unqualified and the marginally equipped seem to believe they are uniquely gifted to be president of the United States.

At the moment a large school of Democrats feel that because they empathize with the working poor, the struggling middle class and are appalled by the excesses of the plutocrats, they can, when elected, put it all right. They confuse empathy with policy and achievability.

Then there are those who subscribe to the belief in business as the incubator of all skills. These are the people who believe — and they could well line up for former Starbucks CEO Howard Shultz — that if you can run a business, you can get a handle on Washington. It is a myth that just won’t die. If one can make a lot of money, it proves just one thing: One has made a lot of money. Running based on commercial success and Washington failure doesn’t work. The two worlds are not subject to the same laws of nature, as it were.

In business, you can walk away from failure; in politics, it follows you. If a franchise deal fails in business, you abandon it. You can’t abandon Russia or China because you can’t get a deal. And you can’t abandon the poor because you think you can’t afford them.

Politics is, above all, learned, and it is learned in political places — school boards, community associations, unions and state legislatures. Anywhere where offices are elective.

If you want to succeed in reshaping Washington, the first thing to do is to understand it and respect it. Yes, respect it.

We are so inured to people running against Washington that we forget that it is the product of all the others who ran against it. Washington, like all complex systems, is the sum of its parts, from the lobbyists to the agencies, and the laws which Congress has passed.

Washington is a seething, dynamic system, not too complex to be reformed but way too complex to be a candidate for simple solutions. Look at the supreme political amateur Donald Trump and see how his plan to upend Washington and “drain the swamp” has fared. In engineering and science, if you want to change something, first understand it — know its parts and their functions before you start.

Rex Tillerson, the former CEO of ExxonMobil, failed to reform the State Department because he didn’t feel he needed to understand it. He failed in his own right, even without the difficulties Trump piled on him.

If politics is war by another means, then don’t show your hand. You don’t tell the enemy where you’ll dig in or what secret weapon you’ll bring to bear. To declare the rate of tax you favor (70 percent for the rich), how you are going to implement a national healthcare system (extend Medicare) and who you’ll not  listen to (lobbyists are a great source of information), and what limits you are going to put on yourself (to draw attention to your rectitude) is neither the way to get elected nor to do the peoples’ business. Caring isn’t a plan.

Many successful presidents, from Washington to Clinton, have been bad businessmen. The best qualification for the office isn’t how well you’ve done at something else, but to have run something big and political like a charity, an advocacy group, a school, a city or a state. That way you learn the art of give a little, take a lot. Those who haven’t had this administrative experience need to study it over and over.

As Lloyd George, the British prime minister during World War I, wrote, “There is no greater mistake than to try to leap an abyss in two jumps.” Every day, I read someone is setting out to prove him wrong and run for president without regard to the geography of the politics.

Good morning class, draw near and listen ever so closely.

So, you all want to be president of the United States, arguably the most difficult and demanding job in the world?

Clearly, you feel that you have unique talents which will promote peace and prosperity and block injustice, racism and men hitting on women.

You are sure that you will be able to curb, gently, the imperial instincts of China and its canny leader, Xi Jinping.

And you have a sure-fire plan to contain Russian President Vladimir Putin’s ambitions in eastern Europe, Asia and the Middle East and to persuade our shaken allies that it is worth standing firm with us.

You might want to know what to do about Africa’s soaring population and declining prospects.

You, also, I trust have given thought to the future as the so called Fourth Industrial Revolution unfolds with huge consequences for the future of work (artificial intelligence taking away jobs); the future of transportation (autonomous vehicles, ships and airplanes); and remote farming (farms operated from city desks).

If you are all set on those things, we can get down to the ones that may decide the election: the social issues, including abortion, education, gender equity and gender equality; gun control; access to health care; immigration; and income inequality.

You might want to tell people how you will turn back the tides and solve global warming. Rich people are starting to worry about their oceanfront homes; that means it will become a fashionable topic with those who have been indifferent screaming for action

Now, ladies, step forward for little individual tutelage.

Elizabeth Warren: You have the pole position as the racers line up, but already there are troubling things. Ms. Warren, you must stop taking President Trump’s bait. How the devil did you get into getting your DNA analyzed? Bad move. Lead the debate, do not join it.

Kamala Harris: A few good notices and you are off and running. Just wait until the opposition research pulls apart the cases you prosecuted when you were a district attorney in San Francisco — and the things you said in court. Two former prosecutors, Rudy Giuliani and Chris Christie, have tarnished the brand.

Kirsten Gillibrand: The announcement on “The Late Show with Stephen Colbert” was, well, weak. It looked like you were there because you had just published a children’s book called something like “Snuggles the Rabbit.” Bold statesmanship was not to be heard. It is hard to look presidential on a comedy program. Looking presidential is worth a lot in the polls, especially at the beginning. Now to those giant flip-flops on guns and abortion. Were you not a darling of the NRA? What about your switching from pro-life to pro-getting-elected? Explain your double epiphany.

Tulsi Gabbard: Step forward and salute. Major, you are the only declared candidate with military service: the only candidate in sight who has worn your country’s uniform and seen active duty. Bravo! That is going to be a huge credential, but not quite enough to outweigh the fact that you are too exotic: born in American Samoa, raised in Hawaii and a Hindu. At 38, you have got time, lots and lots of it. Beware hopefuls. This lady may not be for turning.

To the whole class of four: Have you ever run a large organization? Have you a big scandal you think you can keep hidden (you cannot)? Do you know enough people to staff the Cabinet? Do you know how you will find 1,200 people to fill the positions that must be confirmed by the Senate? How is your golf game?

Three of you are senators, Gillibrand, Harris and Warren, and Gabbard is a member of the House. Hard to run against Washington when you already have contracted Potomac Fever.

Suggestion: Get a big idea and run with that. Keep out of the granular social stuff, it will bring you down. Prepare to be vice president and bide your time.

House, Senate, White House, America’s women are on the move, and may the best woman win.

Photo: U.S. Senator Elizabeth Warren, D-Massachusetts, campaigns for Hillary Clinton at St. Anselm College in Manchester, N..H., on Oct. 24, 2016.

Photo: A man ride a bicycle pass the hole in section of ruined Berlin Wall. By Tossapol Chaisamritpol

It isn’t starting with a bang, but don’t be deceived: The Fourth Industrial Revolution (4IR) is underway, and companies and institutions that ignore it will be overwhelmed by it. Individuals will adapt to it as best we can, as we always have.

In short 4IR is the fusing of the digital, physical and biological spheres. It’s the interconnection of everything, bringing change in companies, jobs, schools and eventually government. Government won’t to be able to stand idly by when it sees traditional businesses upended and huge changes in how we work and study, and where.

As 4IR moves ahead one can reasonably contemplate a time when body parts will be printed, robots will prepare restaurant food and drone taxis will take us to the airport, where departures will be handled without human intervention — because you were verified through facial recognition when you bought your ticket on your smartphone, you won’t need to do anything but walk through security and onto a plane, which has a cabin crew to look after you but no pilots.

Behind and driving the revolution is artificial intelligence, commanding everything from farms, where tractors will start themselves and plow or reap without a human in sight, to street lights that turn off when nothing is moving and back on as needed, to manufacturing that will be dominated by 3D printing, better referred to as additive manufacturing.

The troubadour of 4IR is Klaus Schwab who created the World Economic Forum back in 1971, the world’s most important ideas mart known as Davos, after Davos-Klosters the Swiss resort where the forum meets every year. This year Davos kicks off on Jan. 22 and will be devoted to what Schwab, 80, a German economist and engineer, has called “Globalization 4.0”.

The first forum to look at 4IR was in 2016. Schwab has written two books on the subject — the “The Fourth Industrial Revolution” and “Shaping the Future of the Fourth Industrial Revolution” — and has been ceaseless in promoting the future while warning of it. He told Gerard Baker, the former executive editor of The Wall Street Journal, in a TV interview that enumerating the challenges wasn’t enough, there need to be solutions as well.

A note: Don’t think you can join the 3,000 participants this year. It’s by invitation only. And if you get one, Davos hotel rooms — plain vanilla rooms – can cost $900 a night and suites can go for $5,000 a night. When I checked, there were few vacancies. The movers and shakers start early.

The three past industrial revolutions are listed by Schwab as the replacement of animal power by water and then steam power, the latter at the beginning of the 18^th century; the deployment of electricity, starting in the late 19^th century; and the digital revolution of the last part of the 20^th century.

The Davos meeting will examine the upheaval besetting the world with 4IR and how it’ll be managed. It’s what Schwab calls Globalization 4.0. “We must develop a comprehensive and globally shared view of how technology is affecting our lives and reshaping our economic, social, cultural, and human environments. There has never been a time of greater promise, or greater peril,” he says.

Andre Kudelski, a Silicon Valley veteran, now head of the eponymous Swiss high-tech company that bears his name, says, “A skilled engineer can take control remotely of any connected ‘thing.’ Society has not yet realized the incredible scenarios this capability creates.”

Says Robert Shiller, a Yale University economics professor and 2013 Nobel Prize winner, “We cannot wait until there are massive dislocations in our society to prepare for the Fourth Industrial Revolution.”

Others dream of a cleaner, safer and healthier world. Dileep George, an artificial intelligence and neuroscience researcher, quoted by the forum, says, “Imagine a robot capable of treating Ebola patients or cleaning up nuclear waste.”

Leon Trotsky, a veteran of the Russian Revolution, said, “You may not be interested in war, but war is interested in you.” He might well be paraphrased to say, “We may not be interested in the Fourth Industrial Revolution, but it is interested in us.”

On Jan. 22-25, 2019, in Davos-Klosters, a Swiss resort, the World Economic Forum meets. It is the glitteriest of conferences. The great and the good, the rich industrialists and the glamorous public intellectuals get together to sort out where humanity is headed.

Just to be invited is a kind of credential, a sort of honorary degree, a statement that you are world-class important.

There are politicians, CEOs, so-called thought leaders and the top non-governmental organizations, environmentalists and academics.

The world’s most important international conference it is, but does it work? At some level, yes. At others, no.

It stimulates thinking, but does it change anything? Reading the news coverage year after year you are inclined to think that a lot of the participants come to rehash things they have said before or ideas that have been with them for a long time. Others are stuck in ideological dogma and try to bend the facts to fit the dogma. Think socialist; think Republican.

Yet it has no competition. It is the place to float an idea. Probably no one floats more ideas than the man who founded the forum in 1971 and serves as its executive chairman, Klaus Schwab. He is a visionary German, who holds doctorates in economics and engineering from universities in Germany and Switzerland and a Master of Public Administration from the John F. Kennedy School of Government at Harvard.

It was Schwab who, in 2016, launched the idea of the Fourth Industrial Revolution (4IR) by making it the subject of the forum that year and writing a book on it.

The 4IR is the concept that all of science and technology — from biology to nanotechnology, from quantum computing to artificial intelligence — are coming together with stunning and, at times, frightening visions of the future. A 3D printer may be making a body part while a robot is helping treat Ebola in Africa. New metals are being formulated for specific needs without human input, and farms are operating with few farmers.

In that way, with all science melding and communicating, 4IR may have consequences far beyond the previous three: first, mechanical power from water and steam; then electrical power for manufacturing; and followed by computing power and communications. Now, in the age of the Internet of Things, unity of things from artificial intelligence to advanced medicine.

Enter governments. Schwab sounds a note of warning: Will they grasp and facilitate, or will they frustrate what is happening? Will they regulate when regulation is needed? In short, will the global political class comprehend that it is in the throes of something big — bigger than it can imagine? Will it allow it to flourish while checking its Frankenstein tendencies (as with the social media companies), or will it try to subdue it or let it run to excess?

If the Davos forum has a structural weakness, it seems to me, it is that executives who are mostly middle-age and older are dealing with ideas that have been generated by young scientists, researchers and thinkers. The average age of the people in the control room for the first manned moon launch, Apollo 11, was 28. By the time NASA had become more grown-up, the average age of the control-room operators for the first space shuttle launch was 47.

Call it the sclerosis problem. I have often wondered, as civilian, large airframe design is dominated by two companies, Boeing and Airbus, whether a young engineer with a better idea would get a hearing.

It takes new companies to pursue new ideas. Those that do not grasp the speed of change fall by the way, or are just reduced in size. Half the companies of the Dow in 2000 are not there now.

The 4IR is underway here and now — it is not something in the out-years. A microcosm of 4IR is in the emergence of smart cities where telephones, computers, electricity and social welfare are fusing.

All of this raises the two great questions of our time: What is the future of work and can we save the environment in time? You will hear on these from Davos, no doubt.

A contradicting footnote to the idea that the young are the only big idea merchants: Klaus Schwab is 8o.

Photo: Visions for the South Caucasus and Central Asia. BAKU/AZERBAIJAN, 8APRIL13 – Klaus Schwab, Founder and Executive Chairman, World Economic Forum. Copyright World Economic Forum (www.weforum.org)/Photo by Elmar Mustafayev. This photo is used under the Creative Commons license Attribution-NonCommercial-ShareAlike 2.0

No New Year’s resolutions this year. Nary a one. Instead I am throwing myself, body and soul, into campaigns — campaigns designed to halt the slide in civilized life.

Here are my campaigns:

—Rescue the necktie: More and more men are going around naked about the throat but wearing a pocket square. Now I love pocket squares, very useful if you should meet one of those famous actresses who is always in tears. Whip it out, get it soaked and presto! It goes on eBay.

The thing is neckties are disappearing. Only businessmen on the perp walk and some politicians wear them. Even former President Barack Obama appears to have abandoned them almost entirely — a serious regression.

Ties are important. They conceal protruding Adam’s apples, turkey necks and dirty shirt fronts. Also, they are used to wipe eyeglasses and to twirl when listening to people who go on and on.

—I am pushing to get airline executives to ride “basic coach” on at least one 10-hour flight. They will learn that they are the agents of physical cruelty and weird perversity.

They have ordained travel without luggage because the fees for luggage on “basic” are so high you would be paying for another class of service if you take a suitcase.

The airline bosses should be squeezed into the amazing shrinking toilets (too small for grown-ups); they should have their knees in their faces and have to sit up as straight as a drill sergeant. They should then try to stand up after hours of contortion.

—I want a punitive tax for banks who will not speak to you but will put you through hours of automated telephone hell, in the hope that you will give up and leave them alone (with your money and their fees with which they steal that money).

—Hedge funds that shred the lives of workers and deny customer service in the name of “shareholder value” should be prosecuted for hate speech for those words. “Shareholder value” can be roughly translated as, “We’re going to screw you.” How about “customer value” or a little “social value”?

You have been on the line for hours and are begging the artificial-intelligence recording to let you hear a live human voice, even if it is originating from a faraway country and its owner is speaking English as a third language. The machine says, “Do you want to hear the main menu again?” You slide to the floor, defeated, crazed and suicidal.

I want it to be a federal crime to have a machine with a woman’s voice. They are cursed routinely with foul expletives that even a machine should not have to hear, let alone one that thinks it is a woman. #MeToo should get on this one and demand that the programmer gets the sack without pension.

—I will be working for honesty from automated systems. I do not want my computer to “welcome” me when I turn it on. I believe that it does not care, that it is not sincere and that it is, to this point in time, inanimate and has no feelings. Therefore, when machines say things like “Have a nice day,” even “thank you,” they are lying.

This will change as artificial intelligence is given artificial emotions and machines talk to us in ways so crafty we will not know whether it is a machine or a person. We may not even know if the damned thing has captured the affections of our loved ones. Some states still have an “alienation of affections” common law tort that allows the thwarted lover to sue for stolen love.

Already, you may have a good case for filing a lawsuit against Facebook for running off with your children. Albeit in plain sight.

Happy New Year.

AGRINIO, Greece — There is not a dark cloud hanging over Europe. There are a bunch of them. Taken together they account for a sense of foreboding, not quite despair, but a definite feeling that things are unraveling and, worse, that there is no leadership — second-raters at all the national helms. That was the near consensus at the annual Congress of the Association of European Journalists here in lovely western Greece.

In a class by itself in worries in Europe is Russia. It is creating trouble all over Europe, but especially in the countries that made up the former Soviet Union. It has a propaganda effort the likes of which has not been seen since the days of the Cold War — except modern technology and its social media manifestation have made it more deadly, surreptitious and deniable.

The problem is one that affects news organizations directly. Fake events vie with pernicious posting on social media and relentless cyber-undermining of systems and processes.

Disparaging democracy seems to be a primary Russian goal, making it appear unworkable.

When will Russia move from soft war to hard war? The current standoff over Crimea augers badly for vulnerable Russian neighbors, particularly the Baltic states of Estonia, Lithuania and Latvia. They are battling massive Russian undermining of truth and wonder whether they will fall again to the Russian bear.

Add to this fear a new dynamic: What will America do if Russia moves? The fear is it will do nothing. President Donald Trump’s haranguing of the NATO allies is not reassuring to them.

After the existential worries about Russia, comes Brexit. It is here and now. It is, in the eyes of continentals, a ghastly mistake that is going to cost all of Europe dearly. And what for? The vague shibboleth of “sovereignty.” Euros remain sadly hopeful that somehow there will be a second referendum in Britain and that everything will be as it was: Britain being a stabilizer among the 28 nations that make up the European Union.

Since Britain’s entry in 1973, it has been a fundamental side of an iron triangle of the three big economies: Germany, France and Britain. Britain has been an older sibling, the sensible one. Now the odds are that it will be gone, headed for an uncertain future leaving behind the wreckage of a broken marriage and squandered hope for what Tony Blair, the former Labor prime minister, used to call the “European Project.”

Hungary and the ultra-right policies of Viktor Orban are a very great worry in Europe. Similarly, Poland’s shift to the right and the success of right-wing, near fascist parties across Europe, including Austria (heretofore a center of cautious reasonableness), add to the sense of disintegration.

Two other worries are France and Italy. Along with Hungary and Poland, Italy, with an amalgamated government of the ultra-right and ultra-left, looks as determined as the other two to thumb its nose at the European Union and its rules, maybe to withdraw even. Hungary does it over press freedom and human rights, Italy over fiscal probity and open hostility to the EU.

France is a different story. Emmanuel Macron, the young president was, briefly, the great hope of Europe, but his popularity at home has slid and he has had to turn back his ambitious reforms after street demonstrations, violence and fatalities.

Add to all this shifting sand the uncertain future in Germany where Chancellor Angela Merkel is on her way out and, suddenly, she seems a more desirable leader than she was thought to be during her tenure.

Feeding the swing to the right and as far from resolution today as it was when it began, illegal immigration is an undermining pressure, un-addressed on the left and exploited on the right.

Meanwhile, across Europe press freedom is teetering: a big issue at this congress. As a Bulgarian delegate said to me, “When the press goes, so goes democracy.” Then she added, “We thought that, in some way, America would help, but not now. We are on our own.”

Europe will have a fine Christmas — it does Christmas so well. Next year though, some of the stresses may reach breaking point and the carols will have given way to uglier, discordant notes.

Photo: Germany: Bundestag building decorated on Christmas holidays.