High-tech companies like Google or Microsoft carefully measure the cognitive abilities of prospective employees out of the same belief: they are convinced that those at the very top of the IQ scale have the greatest potential.

If suicide is coupled, then it isn’t simply the act of depressed people. It’s the act of depressed people at a particular moment of extreme vulnerability and in combination with a particular, readily available lethal means.

those at the very top of the class — are going to face a burden that they would not face in a less competitive atmosphere. Citizens of happy countries have higher suicide rates than citizens of unhappy countries, because they look at the smiling faces around them and the contrast is too great. Students at “great” schools look at the brilliant students around them, and how do you think they feel? The phenomenon of relative deprivation applied to education is called — appropriately enough — the “Big Fish–Little Pond Effect.” The more elite an educational institution is, the worse students feel about their own academic abilities. Students who would be at the top of their class at a good school can easily fall to the bottom of a really good school. Students who would feel that they have mastered a subject at a good school can have the feeling that they are falling farther and farther behind in a really good school. And that feeling — as subjective and ridiculous and irrational

In the past generation, the American educational system has decided not to seek the very best teachers, give them lots of kids to teach, and pay them more — which would help children the most. It has decided to hire every teacher it can get its hands on and pay them less.

The phenomenon of relative deprivation applied to education is called — appropriately enough — the “Big Fish–Little Pond Effect.” The more elite an educational institution is, the worse students feel about their own academic abilities. Students who would be at the top of their class at a good school can easily fall to the bottom of a really good school. Students who would feel that they have mastered a subject at a good school can have the feeling that they are falling farther and farther behind in a really good school. And that feeling — as subjective and ridiculous and irrational as it may be — matters. How you feel about your abilities — your academic “self-concept” — in the context of your classroom shapes your willingness to tackle challenges and finish difficult tasks. It’s a crucial element in your motivation and confidence.

Suppose you were to total up all the wars over the past two hundred years that occurred between very large and very small countries. Let’s say that one side has to be at least ten times larger in population and armed might than the other. How often do you think the bigger side wins? Most of us, I think, would put that number at close to 100 percent. A tenfold difference is a lot. But the actual answer may surprise you. When the political scientist Ivan Arreguín-Toft did the calculation a few years ago, what he came up with was 71.5 percent. Just under a third of the time, the weaker country wins. Arreguín-Toft then asked the question slightly differently. What happens in wars between the strong and the weak when the weak side does as David did and refuses to fight the way the bigger side wants to fight, using unconventional or guerrilla tactics? The answer: in those cases, the weaker party’s winning percentage climbs from 28.5 percent to 63.6 percent. To put that in perspective, the United States’ population is ten times the size of Canada’s. If the two countries went to war and Canada chose to fight unconventionally, history would suggest that you ought to put your money on Canada.

To assume the best about another is the trait that has created modern society. Those occasions when our trusting nature gets violated are tragic. But the alternative - to abandon trust as a defense against predation and deception - is worse.

The trick to finding ideas is to convince yourself that everyone and everything has a story to tell. I say trick but what I really mean is challenge, because it’s a very hard thing to do.

The phenomenon of relative deprivation applied to education is called — appropriately enough — the “Big Fish–Little Pond Effect.” The more elite an educational institution is, the worse students feel about their own academic abilities.

Our world requires that decisions be sourced and footnoted, and if we say how we feel, we must also be prepared to elaborate on why we feel that way. I think that approach is a mistake, and if we are to learn to improve the quality of the decisions we make, we need to accept the mysterious nature of our snap judgements. We need to respect the fact that it is possible to know without knowing why we know and accept that — sometimes — we’re better off that way.