Usually, when we think of someone with a bit of self-delusion, we don’t think of it as a very positive thing . . . actually quite the opposite.

However, there may be some evolutionary advantages to self-delusion which has made humans a bit more susceptible to over-confidence than one might have thought.

See the article at io9 – http://io9.com/5840415/why-a-little-self+delusion-can-be-a-very-good-thing – for an interesting read.

– Brian