I don’t understand why this post is being down-voted as it clearly states one of the foundations of socialism.
A quick (and very) simplified summary of the traditional socialist perspective is that in capitalism, the vast majority of the population must work as wage-earners (proletariat) to provide the means to sustain their life.
A much smaller group of people (capitalists or bourgeoisie) own the means of production and do not need to work. The material interests of these two groups are in opposition (class struggle): value is created by work done (labour theory of value) and it is in the interest of capitalist owners to exploit workers as much as possible, i.e., maximise the amount of value they can extract as profit.
As economic value is created by the labour of workers, in an advanced industrial society, they are the class with the potential to consolidate this economic power: if they were to unite (in unions and socialist parties), they could use this economic power to take political power from the capital class. The goal of the socialist is to unite workers across boundaries so that they understand that their material interests coincide with other workers (class consciousness) – what they have in common is more important than what divides them. If workers don’t see that their material interests lie with the vast majority who have to work to live, the class will remain divided (as illustrated by the Ronald Wright quote).
As well as these two primary classes, there are other (smaller) classes in capitalist society, such as
- petit-bourgeoisie (small capitalists who own their means of production, e.g. shop-keeper) who can employ workers but don’t possess sufficient capital to not have to work themselves. Their class interests can lie with both capitalist and worker.
- lumpen proletariat – the underclass of the proletariat who don’t provide economic value, e.g., thieves, beggars, criminals; they lack class consciousness and act in their individual self-interest; they can be used by capitalists against the interests of the proletariat (e.g., strike-breaking, inciting racism to divide workers).