Published in 1955 this book still has a lot of relevant thinking. For example: “Exploitation as it developed in the nineteenth century was essentially different. The worker, or rather his labor, (became) a commodity to be bought by the owner of capital… . Exploitation was not personal anymore, it had become anonymous as it were. It was now the law of the market that condemned a man to work for starvation wages rather than the intention or greed of any individual person.” This is different from slavery and from a feudal relationship between an aristocrat and his vassal and yet is really more the same than different.
An further on: “The fact remains the same, that a man, a living human being, ceases to be an end in himself and becomes the means for the economic interests of another man, or of himself, or of an impersonal giant, the economic machine.” Fromm’s point is that to be used this way erodes a person’s mental health.