Know thy enemy:
he does not care what colour you are
provided you work for him and yet you do!
he does not care how much you earn
provided you earn more for him and yet you do!
he does not care who lives in the room at the top
provided he owns the building and yet you strive!
he will let you write against him
provided you do not act against him and yet you write!
he sings the praises of humanity
but knows machines cost more than men.
Bargain with him, he laughs, and beats you at it;
challenge him, and he kills.
Sooner than loose the things he owns
he will destroy the world.
SMASH CAPITAL NOW!
But as you hasten to be free
And build your commonwealth
Do not forget the enemy
Who lies within yourself.
[There is an abridged version online which apparently comes from a Paris poster of 1968 - however IMHO it misses out the most important parts of the poem and reverses its essential meaning]