Raj Persaud is joint podcast editor for the Royal College of Psychiatrists and also now has a free app on iTunes and google play store entitled 'Raj Persaud in conversation', which includes a lot of free information on the latest research findings in mental health, plus interviews with top experts from around the world.
Are these examples of pure evil? Anders Breivik bombed buildings in 2011 killing eight people, then shot 69 others, mostly teenagers. He showed no remorse and took pride in his actions. In May 2013, three women and one six-year-old girl were rescued from kidnapper, Ariel Castro, having been held in captivity for around a decade in the USA. Following over 900 criminal counts, he killed himself just one month into a prison term of 1,000 years.
Psychologists Russell Webster and Donald Saucier have just published the most comprehensive scientific investigation into our beliefs over whether unadulterated wickedness exists. One interpretation is that accepting the existence of 'Pure Evil', reveals the true nature of deepest malevolence itself.
Those who believe in 'Pure Evil' consider bad or criminal behaviour is wilful, conscious and driven primarily by the wish to inflict harm, merely often for pleasure.
The psychologists, based at North Central College and Kansas State University in the USA point out that the 'Belief in Pure Evil' holds profound consequences for believers. As there would be no point in being patient, tolerant and understanding, when confronted with unalloyed villainy, then the only response should be eliminating such evil-doers, even if extreme actions are required.
If you believe in 'Pure Evil', you also deem that evil-doers will implacably continue being dangerous. This necessarily follows if certain culprits are indeed the embodiment of undiluted viciousness. On both sides of conflict, if each sees the other side as 'evil', this inevitably results in reciprocal and escalating prejudice with violence.
Perhaps scientists had been reluctant to study evil before because it seems religious, yet Russell Webster and Donald Saucier point out that cultures all over the world and throughout history, have a surprisingly similar "personal archetype of evil". This includes the conviction that "behind evil actions must lie evil individuals".
Their study entitled Angels and Demons Are Among Us: Assessing Individual Differences in Belief in Pure Evil and Belief in Pure Good, focused on the shape of malevolence in people's minds. The research found beliefs over the existence of 'Pure Evil' could reveal key aspects of character.
The series of investigations involving hundreds of participants found believing that others can be completely immoral, in turn leads to more aggressive plus hostile attitudes and behaviour. Believers in the existence of 'Pure Evil' are more pessimistic generally, see the world as a more vile and dangerous place, are more opposed to equality, endorse torture, the death penalty and pre-emptive military aggression.
Believers in 'Pure Evil' consider that trying to understand evil is futile, because 'Pure Evil' is a deeply ingrained part of character, and understanding will only foster greater empathizing with perpetrators, condoning their harmful behaviour.
This most comprehensive investigation, to date, into our views on deep malevolence, published in the journal Personality and Social Psychology Bulletin, also found 'Belief in Pure Evil' was not associated with being religious.
Instead another conviction - the 'Belief in Pure Good' was. It appears from this study that those who believe in 'Pure Good' are fundamentally different from those who believe in 'Pure Evil'.
Believers in 'Pure Good' accept the existence of pure altruism, that some people, though rare, intentionally help others just for the sake of helping, with no personal benefit or hidden agenda. They also judge that even the most ghastly perpetrators - ie wayward criminals, can see "the error of their ways" and reform, ie they are not 'Purely Evil'. Those who more strongly believed in 'Pure Good', supported criminal rehabilitation and opposed the death penalty.
Those who score higher in 'Belief in Pure Good' are more likely to believe that doing good means not harming others (unless one's country or allies are directly endangered). People scoring higher in 'Belief in Pure Evil' feel that pre-emptive violence and aggression are justified to root out evil-doers.
'Belief in Pure Good' was associated strongly with being religious, as well as those reporting more secular volunteering. The authors speculated that 'Belief in Pure Evil' and religiosity were not as strongly associated as might be expected, because organized religions may recently be downplaying the role of battling evil. But perhaps the sample studied did not contain enough evangelical or fundamentalist participants.
Believing strongly in 'Pure Good' was related to less aggression, supporting diplomacy over violence as an approach to foreign affairs, and being against torture.
Russell Webster and Donald Saucier point out that part of the belief in 'Pure Good' is that it surely cannot be corrupted by the forces of evil. 'Pure Good' can resist temptations over joining the "dark side" (using 'Star Wars' terminology).
Yet apparent do-gooders like Mother Theresa and Gandhi, may have had their reputations tarnished in recent years by various re-evaluations, casting doubt that both these characters, (and many others apparently 'Purely Good'), were in fact as virtuous as first thought.
This modern drive to doubt that 'Pure Good' really does exist, could have grave and far-reaching implications, in terms of our pessimism about each other.
Doubting 'Pure Good' exists may justify people's apathy over helping others: If 'everybody is selfish', then theoretically we need not feel guilty about our own self-interested behaviour, or endeavour to be more helpful.
Believers in 'Pure Good' tended to think more deeply about the causes for other's behaviour, while believers in 'Pure Evil' scored significantly lower on this.
So, do you know of selfless good work epitomizing pure good ("angels")? Or are you aware of others who because of their selfish hostility appear to display pure evil ("demons")?
If you believe 'angels' and 'demons' live amongst us, that pure good and pure evil exist, this conviction has just been found by this research to profoundly influence your own behaviour and outlook on life.
If you believe in 'Pure Evil' it seems you are not convinced 'Pure Good' exists - perhaps because you suppose it will be overcome by 'Pure Evil'. If you feel there is 'Pure Good', then it appears you tend not to accept 'Pure Evil'; maybe you consider 'Pure Good' will triumph over 'Evil'.
If you believe in 'Pure Evil' you are more likely to react aggressively to wrong-doing, while if you deem 'Pure Good' exists, you're more optimistic about human nature, and believe that the bad can change, supporting programmes that see the better side of people.
One interpretation of this study is that Believers in 'Pure Good' and 'Pure Evil' end up behaving a bit like the angels and demons they perceive as existing in the world.
We become the very Demons and Angels we think exist.
We make them come true.