If we want a definition---I was taught this one.

Isn't there a Mental Health Continuum?

At one end of the spectrum=ability to function ADL's--------the other=inability to function ADL's (activities of Daily Living)---as pointed out by you, Dragon.

The main point of my post here, was that it is veritably impossible to be an individual in our society; not to mention an individual with great talent; without great ridicule thrown at you by others, and the many other impediments that go with great loneliness.

Look at the great artists, musicians, writers of all times--------how many went "mad"
or, rather lost their ability to function because of the cruelty of a world which does not encourage individuality? They had no support systems, no guidance--they had to forge their own path..............

This is a lonely, and an unatural path--it easily can lead one to an inability to "function" in our society, then, and now.

Far easier, as VenusHalley puts it, to attain a " get out of life free pass" to "madness".