Now you have inspired me:
Q: How many Marxists does it take to screw in a light bulb?
A: None -- The light bulb's own internal contradictions contain the seeds
of its own
revolution.
A: Two - one to screw it in, and a second to hand out leaflets.
Q: How many conservatives does it take to change a light bulb?
A: One -- after reflecting in the twilight on the merit of the previous
bulb.
Q: How many running-dog lackeys of the bourgeoisie does it take to change a
light bulb?
A: None -- that's the proletariat's work!
Q: How many Chinese Red Guards does it take to screw in a light bulb?
A: 10,000 - to give the bulb a cultural revolution.
Q: How many nihilists does it take to change a light bulb?
A: There is nothing to change.
Q: How many economists does it take to screw in a light bulb?
A: Two. One to assume the ladder and one to change the bulb.
See generally:
http://dir.yahoo.com/Entertainment/Humor/Jokes/Light_Bulb_Jokes/
David Shemano