The creeping redefinition of violence

Alex Hern speaks to David Graeber about the liberal abandonment of Occupy New York.

For a brief moment in 2011, it seemed like change was in the air. The Occupy movement, growing from an encampment in Zuccotti Park in Manhattan into a worldwide network of activists, aimed to bring the spirit of the Arab Spring, the Spanish Indignados movement and the Syntagma Square demonstrations in Athens to America. But then it all came crashing down; in some cities, literally so.

Anthropologist, author and activist David Graeber was there from the start. I met him in a café outside Goldmiths University to talk about his new book, The Democracy Project, which chronicles the rise of Occupy, the conditions which allowed it to happen and the political motivations behind its downfall.

There's always been a deal between the activist and parliamentary left. Graeber phrases it as "we win them a place at the table, they keep us out of jail". Even if the soft left might not agree with the tactics or the politics of those on the barricades, they have historically protected them to a certain extent – because their political negotiations were significantly easier if they could point to a body of people who wanted to go much further.

But in recent years, with 9/11 being the key break-point, that relationship has broken down. And it was sundered completely once the battle to save occupy began. It started with the police, he insists. The real split between the liberal left and the activists in Occupy happened after the police had already moved in. "Suddenly the debate was not about police smashing people's computers, burning libraries, things that you'd think would be of concern to civil libertarians, but was like" – he puts on a silly voice – "'but, you know, two months ago there was one city where some people broke some windows.' And the amazing thing, as I keep pointing out, is that here we have a movement with 500 occupations, at least 300 of which are major, and there's one city where there was property destruction."

But it was always a tricky position for the movement to be in. While the police were getting more and more militant based on largely illusory threats of violence, the demands for pacifism were getting ever stronger. Graeber takes particular issue with the example of Mahatma Gandhi, who suspended his non-cooperation movement after violence broke out in Chauri Chaura. "Yeah, they hacked 17 policemen apart with machetes. I think if that had happened in Cleaveland, we would have called off the campaign too! It just shows the difference in standards."

A common refrain throughout the period when Occupy was active – and, indeed, during direct action before and since – was that violence against property was used to justify violence against people. Activists break windows, so police break skulls. Wouldn't it be easier to avoid giving them the pretext? And even if radicals want to uphold the moral legitimacy of damaging property in the name of a cause, where's the converse understanding that it is still a weighty action to perform?

"I would put it this way… Imagine there's a child in danger, and the only way you could save that child is by breaking some glass that doesn't belong to you. Would anybody consider that an act of violence? So is it different if it's, like, ten thousand children? The difference is that you don't know – in the case of a child right there, you're pretty sure you'll be able to get them to a hospital, in the case of a political act there's a certain ambiguity. It might backfire, it might not work. Therefore my moral rubric is that in a world of radical uncertainty, don't do anything that would be more damaging if it didn't work. So you don't blow somebody up to save a hundred people, but a window – come on, it's a window!"

Two years later, the ramifications are still being felt. This week's protests in Turkey have been dubbed "Occupy Gezi", even as the links with the Occupy movement – and the Arab Spring, and all the other uprisings large and small – remain hotly debated. I ask Graeber what he thinks Occupy's effects actually were. Was it a sea change? "They will talk about the world revolution of 2011 in the same way they talked about 68, that story is already written. It almost reminds me of the famous Zhoue Enlai quote, on the effects of the French Revolution? Where he said 'it's a little too soon to tell'.

"We're not going to know what it all meant until at least ten years from now. And a lot of it's being fought out right now."

Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Inside Big Ben: why the world’s most famous clock will soon lose its bong

Every now and then, even the most famous of clocks need a bit of care.

London is soon going to lose one of its most familiar sounds when the world-famous Big Ben falls silent for repairs. The “bonging” chimes that have marked the passing of time for Londoners since 1859 will fall silent for months beginning in 2017 as part of a three-year £29m conservation project.

Of course, “Big Ben” is the nickname of the Great Bell and the bell itself is not in bad shape – even though it does have a huge crack in it.

The bell weighs nearly 14 tonnes and it cracked in 1859 when it was first bonged with a hammer that was way too heavy.

The crack was never repaired. Instead the bell was rotated one eighth of a turn and a lighter (200kg) hammer was installed. The cracked bell has a characteristic sound which we have all grown to love.

Big Ben strikes. UK Parliament.

Instead, it is the Elizabeth Tower (1859) and the clock mechanism (1854), designed by Denison and Airy, that need attention.

Any building or machine needs regular maintenance – we paint our doors and windows when they need it and we repair or replace our cars quite routinely. It is convenient to choose a day when we’re out of the house to paint the doors, or when we don’t need the car to repair the brakes. But a clock just doesn’t stop – especially not a clock as iconic as the Great Clock at the Palace of Westminster.

Repairs to the tower are long overdue. There is corrosion damage to the cast iron roof and to the belfry structure which keeps the bells in place. There is water damage to the masonry and condensation problems will be addressed, too. There are plumbing and electrical works to be done for a lift to be installed in one of the ventilation shafts, toilet facilities and the fitting of low-energy lighting.

Marvel of engineering

The clock mechanism itself is remarkable. In its 162-year history it has only had one major breakdown. In 1976 the speed regulator for the chimes broke and the mechanism sped up to destruction. The resulting damage took months to repair.

The weights that drive the clock are, like the bells and hammers, unimaginably huge. The “drive train” that keeps the pendulum swinging and that turns the hands is driven by a weight of about 100kg. Two other weights that ring the bells are each over a tonne. If any of these weights falls out of control (as in the 1976 incident), they could do a lot of damage.

The pendulum suspension spring is especially critical because it holds up the huge pendulum bob which weighs 321kg. The swinging pendulum releases the “escapement” every two seconds which then turns the hands on the clock’s four faces. If you look very closely, you will see that the minute hand doesn’t move smoothly but it sits still most of the time, only moving on each tick by 1.5cm.

The pendulum swings back and forth 21,600 times a day. That’s nearly 8m times a year, bending the pendulum spring. Like any metal, it has the potential to suffer from fatigue. The pendulum needs to be lifted out of the clock so that the spring can be closely inspected.

The clock derives its remarkable accuracy in part from the temperature compensation which is built into the construction of the pendulum. This was yet another of John Harrison’s genius ideas (you probably know him from longitude fame). He came up with the solution of using metals of differing temperature expansion coefficient so that the pendulum doesn’t change in length as the temperature changes with the seasons.

In the Westminster clock, the pendulum shaft is made of concentric tubes of steel and zinc. A similar construction is described for the clock in Trinity College Cambridge and near perfect temperature compensation can be achieved. But zinc is a ductile metal and the tube deforms with time under the heavy load of the 321kg pendulum bob. This “creeping” will cause the temperature compensation to jam up and become less effective.

So stopping the clock will also be a good opportunity to dismantle the pendulum completely and to check that the zinc tube is sliding freely. This in itself is a few days' work.

What makes it tick

But the truly clever bit of this clock is the escapement. All clocks have one - it’s what makes the clock tick, quite literally. Denison developed his new gravity escapement especially for the Westminster clock. It decouples the driving force of the falling weight from the periodic force that maintains the motion of the pendulum. To this day, the best tower clocks in England use the gravity escapement leading to remarkable accuracy – better even than that of your quartz crystal wrist watch.

In Denison’s gravity escapement, the “tick” is the impact of the “legs” of the escapement colliding with hardened steel seats. Each collision causes microscopic damage which, accumulated over millions of collisions per year, causes wear and tear affecting the accuracy of the clock. It is impossible to inspect the escapement without stopping the clock. Part of the maintenance proposed during this stoppage is a thorough overhaul of the escapement and the other workings of the clock.

The Westminster clock is a remarkable icon for London and for England. For more than 150 years it has reminded us of each hour, tirelessly. That’s what I love about clocks – they seem to carry on without a fuss. But every now and then even the most famous of clocks need a bit of care. After this period of pampering, “Big Ben” ought to be set for another 100 or so years of trouble-free running.

The Conversation

Hugh Hunt is a Reader in Engineering Dynamics and Vibration at the University of Cambridge.

This article was originally published on The Conversation. Read the original article.