Aristotle, Politics IV. xi. 4th Century. BC.
In all states there are three state-sections: the very well-off, the very badly off, and thirdly those in between. Since therefore it is agreed that moderation and a middle position are best, it is clear that, in the matter of goods of fortune also, to own a middling amount is best of all. This condition is most easily obedient to reason, and following reason is just what is difficult both for the exceedingly rich, handsome, strong and well-born, and for their opposites, the extremely poor, the weak, and those grossly deprived of honour. The former incline more to arrogance and crime on a large scale, the latter are more than averagely prone to wicked ways and petty crime.