Two political light bulb jokes, one for each pole, plus a bonus.
How many liberal arts professors does it take to screw in a lightbulb?
Interesting question. What we think of as a "darkness" is actually the absence of light, but we associate a "-ness," a state of being, to the dark, such that the lack of a lightbulb -- a thing -- creates its counterpart -- this thing we call "darkness."
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How many neocons does it take to screw in a lightbulb?
None. They like to keep people in the dark.
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How many Marxists does it take to screw in a lightbulb?
None. The lightbulb contains the seeds of its own revolution.