But 'failure to understand reality', now that one really describes the average human being (and in particular some of the above average ones). Granted, there are degrees of such faulty comprehension, and true schizophrenics are obviously on the extreme end of the spectrum, but it's all the same condition. So it's not surprising that a more rational and objective analysis of schizophrenia defines it as social illness rather than strictly genetic or physical, i.e. it is the result of the toxic influence of our wonderful, modern social mores and 'norms' on a person's mind, body and soul. Schizophrenics may be extreme cases, but we're all affected.
Is there any essential difference between a schizophrenic who believes something because voices told them to, and an entire nation of people believing that the US invaded Iraq to bring freedom and democracy because their government told them to? In both cases, the person/people are being manipulated by a bogus, manipulative authority. The only important distinction I can think of is that in the first case a single person's life is negatively affected, in the second, millions of lives are not only negatively affected, but destroyed.
So I'd argue that everyone is 'schizophrenic' to one degree or another, and anyone who disagrees should go see a shrink. But a specific example of people's maladaptation to truth or reality was brought to my attention when reading a story on RT.com about a wonderful recent event at Kruger national park: a lion ate a buffalo. Not impressed? Well the 'highlight' of this event for observers (and half the internet) is the fact that the lion tore open the (female) buffalo's stomach and pulled out its unborn fetus and carried it off to a few other lions who all ate it.
As it burrows its head in the bloody cavities of the dead animal it can be seen pulling out a fleshy object.
'What is it?' the man watching wonders, 'It looks like a bit of stomach.'
Then suddenly, as the big cat makes off with its find, the woman gasps in shock, 'It's a baby!' she cries.
'That was pregnant, it got the baby out,' she says in disgust, 'Oh my goodness, gross.'