One word: Eysenck.
The psychologist Hans Eysenck theorised
that Fascism and Communism, though diametrically opposed on the traditional
Left-Right spectrum, had something essential in common. This, he suggested, was
the ‘toughmindedness’ of Fascism and Communism alike. Toughmindedness is
connected with extroversion and low conditionability and inhibitability. For an
example of conditioning, one should think of Pavlov’s dogs. “To inhibit” in this
context means to temporarily wean from conditioning. People who are easy to
condition (and thereby to inhibit) tend to be introverts, because they tend to
avoid stimulation, as they are easily overstimulated. For this reason they tend
to be ‘Liberals’, that is, take a political position of seeking to curb
expressions of aggression and sexuality.
‘Liberals’ in this sense [tend] to be in the center of the traditional Left-Right axis,
which I think is because for them the individual is prior to society. For this
reason, they tend to be opposed as much to statelessness (as in Marxian
Communism) as to totalitarianism (as in Mussolinian Fascism). They are opposed
to statelessness because statelessness, contrary to what Marx thought, would of
course mean anarchy, the state of nature, the war of all against all (or, as
Nietzsche implied in The Greek State, the war of all families against all
families). And they are opposed to totalitarianism because they feel the
individual should be above the state (we should probably think of Kant here, who
thought the individual should never be treated as a means: and indeed, “Liberal”
here means Enlightenment Liberal).
http://groups.yahoo.com/group/human_superhuman/message/491
P.S.: True hysteria—hysteria of the type Jung meant—is a pathological condition of extroverts, i.e., people of low conditionability and inhibitability. It works like this: a great physical mass has a great inertia, i.e., it takes great force to get it to move; but once it’s in motion, it takes great force to stop it. Thus when extroverts have finally gotten into a state of over-excitement, it’s very hard to calm them down again.