The oligarchy exposed

Critics of the Occupy Wall Street movement have asserted that their goals are not clear and they don’t have solutions, although it is pretty obvious (as this Tom Tomorrow cartoon says) that economic injustice is their main grievance. But Paul Krugman points out that the hysterical response to the Occupy Wall Street movement is a telling indicator of the fact that the protestors have achieved one major goal: they have put the role of the financial oligarchy in causing the nation’s problems in the spotlight and they are squirming and want to shut down the discussion. They much prefer to do their work in the shadows.

The answer, surely, is that Wall Street’s Masters of the Universe realize, deep down, how morally indefensible their position is. They’re not John Galt; they’re not even Steve Jobs. They’re people who got rich by peddling complex financial schemes that, far from delivering clear benefits to the American people, helped push us into a crisis whose aftereffects continue to blight the lives of tens of millions of their fellow citizens.

Yet they have paid no price. Their institutions were bailed out by taxpayers, with few strings attached. They continue to benefit from explicit and implicit federal guarantees — basically, they’re still in a game of heads they win, tails taxpayers lose. And they benefit from tax loopholes that in many cases have people with multimillion-dollar incomes paying lower rates than middle-class families.

This special treatment can’t bear close scrutiny — and therefore, as they see it, there must be no close scrutiny.

Peter Singer’s review of Steven Pinker’s new book

The always readable Steven Pinker has a new book out titled THE BETTER ANGELS OF OUR NATURE: Why Violence Has Declined arguing that there has been a steady drop in violence over time. The equally readable Peter Singer has a very positive review of the book, of which the following is an excerpt.

Against the background of Europe’s relatively peaceful period after 1815, the first half of the 20th century seems like a sharp drop into an unprecedented moral abyss. But in the 13th century, the brutal Mongol conquests caused the deaths of an estimated 40 million people — not so far from the 55 million who died in the Second World War — in a world with only one-seventh the population of the mid-20th century. The Mongols rounded up and massacred their victims in cold blood, just as the Nazis did, though they had only battle-axes instead of guns and gas chambers. A longer perspective enables us to see that the crimes of Hitler and Stalin were, sadly, less novel than we thought.

Since 1945, we have seen a new phenomenon known as the “long peace”: for 66 years now, the great powers, and developed nations in general, have not fought wars against one another. More recently, since the end of the cold war, a broader “new peace” appears to have taken hold. It is not, of course, an absolute peace, but there has been a decline in all kinds of organized conflicts, including civil wars, genocides, repression and terrorism. Pinker admits that followers of our news media will have particular difficulty in believing this, but as always, he produces statistics to back up his assertions.

The final trend Pinker discusses is the “rights revolution,” the revulsion against violence inflicted on ethnic minorities, women, children, homosexuals and animals that has developed over the past half-century. Pinker is not, of course, arguing that these movements have achieved their goals, but he reminds us how far we have come in a relatively short time from the days when lynchings were commonplace in the South; domestic violence was tolerated to such a degree that a 1950s ad could show a husband with his wife over his knees, spanking her for failing to buy the right brand of coffee; and Pinker, then a young research assistant working under the direction of a professor in an animal behavior lab, tortured a rat to death. (Pinker now considers this “the worst thing I have ever done.” In 1975 it wasn’t uncommon.)

Relativity-1: Going backwards in time

Part of the reason that recent reports of the detection of neutrinos traveling faster than the speed of light aroused such excitement is because of claims that such a discovery would overthrow Einstein’s venerable theory of relativity and that if you could send a signal faster than the speed of light, you could go backwards in time. Are these claims true or simply overheated? If true, what exactly was overthrown? And what does it mean to ‘go backwards in time’ anyway?

My initial reaction to the faster-than-light neutrino report was one of skepticism, saying that I would wait and see if the result held up but was not hopeful that it would. I did not give my reasons for this pessimism and reflecting later, I thought I should because understanding what was claimed (and why) serves as a good vehicle to understand the elements of the theory of special relativity as well as how science works., so the next series of posts will deal with these questions. (I was overdue for a series of posts on a single topic anyway.)

Let’s look first at the ‘backwards in time’ claim. There is a simple (but wrong) way of interpreting this and a more subtle (but correct) way.

To see the simple way in which something traveling faster than the speed of light can cause things to appear to go backwards in time, think of a situation in which a man fires a gun at another man but with the bullet traveling faster than the speed of light. Nothing requires the shooting of people to understand this phenomenon but this is the customary example that is used, perhaps because a bullet is the fastest object that most people can think of (although it is still much slower than the speed of light) combined with the fact shooting someone is so dramatic and final that reversing the process seems impossible, kind of like Jesus rising from the dead.

Suppose the shooter is at point A and the person hit is at point B 10 meters away. Suppose you are standing right next to the person at B. If the bullet travels faster than the speed of light, what will you see? Remember that we ‘see’ something only when the light from that event enters our eyes. Since the speed of light (at 299,792 km/s) is beyond anything we are familiar with from our everyday experiences, let’s greatly slow things down by assuming that it travels at (say) 1 m/s and that the bullet travels at (say) 2 m/s.

You will see the gun at A firing 10 seconds after it fires because the light from that instant will take that much time to travel the 10 meters to reach you. But one second after the gun is fired, the bullet will have traveled two meters towards B (and you), and light emitted by the bullet at that point will take only 8 more seconds to reach you. In other words, you will see the bullet at the 2 meter point 9 seconds after the gun is fired, which is one second before you see the gun firing. Similarly you will see the bullet at the 4 meter mark 8 seconds after the gun fires, at the 6 meter mark 7 seconds after the gun fires, at the 8 meter mark 6 seconds after the gun fires, and the bullet entering the person at B 5 seconds after the gun fires. Put it all together and what you see first is the person at B being hit (five seconds after the gun fires) and then in the next five seconds will see the bullet emerging from the victim and traveling back and entering the gun.

This no doubt looks like is going backwards in time. But this example is not what is meant by going backwards in time according to the theory of reelativity. After all, the victim was in fact hit five seconds after the gun was fired so there is no actual reversal of the ordering of the events. What you saw is more like watching a film run backwards, which is not really going backwards in time. This effect is an illusion, an artifice caused by the fact that light takes time to travel and your special location next to the victim. Had you observed the whole sequence of events while standing next to the shooter at A, you would not have noticed anything unusual because you would have seen the gun fire right at the beginning, the bullet at the 2 meter mark after 3 seconds, at the 4 meter mark after 6 seconds, at the 6 meter mark after 9 seconds, at the 8 meter mark after 12 seconds and hitting the person at B after 15 seconds. Everything would have seemed normal.

What this example does illustrate is that specifying the time at which an event occurs by the time noted by an observer is not satisfactory because it depends on where the observer is situated relative to the events. (For example, the bullet was observed at the 2 meter mark at 3 or 9 seconds after the gun was fired depending on where you were standing.) We will also see later that in addition to the location, the state of motion of the observer (if you were observing the events from a moving train, for example) also affects the time at which they see events.

It is in trying to unambiguously pin down exactly when something happens that we arrive at a deeper understanding of Einstein’s theory of relativity and what we really mean by going backwards in time.

Next: The CERN-Gran Sasso experiment

There really are death panels

Unlike the ones that exists only in the fevered imagination of opponents of health care reform who labor under the delusion that these panels exist to decide who should get medical treatment and who should be left to die, these death panels are real and consist of people who decide in secret which Americans deserve to be killed by the president, using the entire military apparatus at his disposal.

This report confirms what was reported as far back as in February 2010 when Dennis Blair, the Director of National Intelligence, said in a Congressional hearing that the intelligence community had the right to kill Americans abroad who have been deemed to be a threat.

So our government thinks it has the right to send roving gangs of assassins anywhere in the world to murder anyone whom the president has decided must die. It is astonishing to me that people are not outraged.

Glenn Greenwald has more. As usual, political cartoonist Ted Rall nails it.

Sexism, atheism, and the volatility of internet discourse

My post on the topic of sexism in the atheist movement generated a lot of comments. As is often the case with heated discussions, a lot of different issues quickly got added into the mix and so it might be good to step back a bit and look at the big picture.

My original question was whether the atheist community had a problem with sexist attitudes towards women as evidenced by the response that Rebecca Watson received when she reported on her blog about an incident in an elevator at an atheist gathering.
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