When I say or give slogan or a war cry “Workers of the World Unite, (you have nothing to lose but your chains)”, what do I mean? This slogan must have been repeated, written, in all the languages of the world over zillions of times, echoing what Karl Marx and Friedrich Engels said in Communist Manifesto.
Originally in German: Proletarier aller Länder vereinigt Euch!, literally “Proletarians of all countries, unite!”, and later in English as quoted above. “Workers of all the land unite” or “workers and the oppressed people of the world unite” are variations of the same slogan, but leading to same meaning and same call for the unity and struggle.
I understand, firstly, that our enemy is a class (not an individual or a group), today, capitalist class, whose sole aim is to seek surplus-value ruthlessly, increase the relative surplus-value even at the cost of my life (absolute surplus value is constant for a given time and in a given society). My brother or sister working for another capitalist, after selling his or her labour-power, faces the similar exploitation and repression if resists, and the state power comes to help the capitalist and not him or her. The capitalist class is the common enemy of the working class, irrespective of which country he or she is from. It also makes no difference if the religion, caste, colour, creed, gender are different.
Second, my emancipation from the capitalist class (not only the present master, be a capitalist, financier, or state where I am working) is possible only if we, as a class, unite and struggle for a common aim, following well-planned programs, overthrow the capitalist class and its state, establish our own state (a temporary measure) and control all the production and circulation! That leads to a classless, casteless, bias less society, where any form of discrimination and injustice does not exist!
And, finally, even during the interim period, till revolution has not succeeded and socialist society is not formed, we the workers must remain united, as that would make our struggle streamlined and our lives, as well, be free of our internal fight, on behest of the enemy class!