Let the ruling classes tremble at a Communistic revolution. The proletarians [workers] have nothing to lose but their chains. They have a world to win. Working men of all countries, unite!

What was the authors’ most likely purpose in writing this passage?

to inspire the workers of the world to join the communists
to describe the merits of communism over capitalism
to explain their justification for starting a revolution
to identify the problems associated with capitalism