Why is a two-year-old so terrible? Because she is systematically testing the fascinating and, to her, utterly novel notion that something that gives … - Malcolm Gladwell

When people in authority want the rest of us to behave, it matters — first and foremost — how they behave. This is called the “principle of legitimacy,” and legitimacy is based on three things. First of all, the people who are asked to obey authority have to feel like they have a voice — that if they speak up, they will be heard. Second, the law has to be predictable. There has to be a reasonable expectation that the rules tomorrow are going to be roughly the same as the rules today. And third, the authority has to be fair. It can’t treat one group differently from another. All good parents understand these three principles implicitly. If you want to stop little Johnnie from hitting his sister, you can’t look away one time and scream at him another. You can’t treat his sister differently when she hits him. And if he says he really didn’t hit his sister, you have to give him a chance to explain himself. How you punish is as important as the act of punishing itself.

There is more courage and heroism in defying the human impulse, in taking the purposeful and painful steps to prepare for the unimaginable.

The “IQ fundamentalist” Arthur Jensen put it thusly in his 1980 book Bias in Mental Testing (p. 113): “The four socially and personally most important threshold regions on the IQ scale are those that differentiate with high probability between persons who, because of their level of general mental ability, can or cannot attend a regular school (about IQ 50), can or cannot master the traditional subject matter of elementary school (about IQ 75), can or cannot succeed in the academic or college preparatory curriculum through high school (about IQ 105), can or cannot graduate from an accredited four-year college with grades that would qualify for admission to a professional or graduate school (about IQ 115). Beyond this, the IQ level becomes relatively unimportant in terms of ordinary occupational aspirations and criteria of success. That is not to say that there are not real differences between the intellectual capabilities represented by IQs of 115 and 150 or even between IQs of 150 and 180. But IQ differences in this upper part of the scale have far less personal implications than the thresholds just described and are generally of lesser importance for success in the popular sense than are certain traits of personality and character.