None, because they can't change anything.
Trick question, anarchists can't change anything.
One to over hype the new lightbulb and one to make sure it breaks within a year.
It's a really obscure number and you've probably never heard of it.
One to hold the lightbulb, and the rest of the world to revolve around them
Two. One to change it and one to yell "Ta-daa!" when he's done.
A: Three - one to change it, one to not-change it and one to both change-and not-change it.