All workers in the world will eventually unify in a revolution against the bourgeoisie is one of the argument made in the Communist Manifesto.
Step-by-step explanation:
The bourgeoisie concept evolved in the Communist Manifesto. Also known as the middle class or the working class, this was the result of the industrial revolution as that resulted in the goods being made available at cheaper rates along with more availability.
For this, the goods had to be produced at a mass scale, thus also creating a labourer class. Communist Manifesto talks about how the workers will unify to fight against the bourgeoisie.