Our egotism and self-confidence can sometimes spill-over to our loved ones.
It's now well known that many of us over-estimate our own brainpower. In one study, more than 90 per cent of US college professors famously claimed to be better than average at teaching, for instance – which would be highly unlikely. Our egos blind us to our own flaws.
What's the role of evil in storytelling?
Towards the end of the Disney film Aladdin (1992), our hero's love rival, the evil Jafar, discovers Aladdin's secret identity and steals his magic lamp. Jafar's wish to become the world's most powerful sorcerer is soon granted, and he then uses his powers to banish Aladdin to the ends of the Earth.