Here is an excerpt:
We are vain and overconfident. Our irrationality and dogmatism might not be so bad were they married to some humility and self-insight, but most of us walk about with inflated views of our abilities and qualities, such as our driving skills, intelligence and attractiveness – a phenomenon that’s been dubbed the Lake Wobegon Effect after the fictional town where ‘all the women are strong, all the men are good-looking, and all the children are above average’. Ironically, the least skilled among us are the most prone to overconfidence (the so-called Dunning-Kruger effect). This vain self-enhancement seems to be most extreme and irrational in the case of our morality, such as in how principled and fair we think we are. In fact, even jailed criminals think they are kinder, more trustworthy and honest than the average member of the public.
We are moral hypocrites. It pays to be wary of those who are the quickest and loudest in condemning the moral failings of others – the chances are that moral preachers are as guilty themselves, but take a far lighter view of their own transgressions. In one study, researchers found that people rated the exact same selfish behaviour (giving themselves the quicker and easier of two experimental tasks on offer) as being far less fair when perpetuated by others. Similarly, there is a long-studied phenomenon known as actor-observer asymmetry, which in part describes our tendency to attribute other people’s bad deeds, such as our partner’s infidelities, to their character, while attributing the same deeds performed by ourselves to the situation at hand. These self-serving double standards could even explain the common feeling that incivility is on the increase – recent research shows that we view the same acts of rudeness far more harshly when they are committed by strangers than by our friends or ourselves.