AFAIK wrote:I get the impression Marxists have a blind spot for certain labour relations.
Labour relations are pretty much our bread and butter.
Slavery and debt bondage were widely practiced in many capitalists societies (they still are but are no longer state-sanctioned and are increasingly marginalised) and the proletariat who has nothing to sell but his labour is the ideal.
Debt bondage is still a kind of proletarian labour, and slavery (in its latest incarnation) came about because of capitalism, but you're generally correct here...
Livestock is in the equivalent position as slaves, which I haven't seen Marx or Engels write about.
But livestock does not labour in the same way slaves do. Further, they never have and thus have not developed as people have developed. If we are looking at labour relations, we have to look at labour itself. Livestock cannot do labour in the way Engels (and I dare say most people) define labour.
The bit from Engels I posted has some incorrect things in the main due to its 19th century authorship (for instance, men developed from apes from a now sunken island off of India instead of from Africa). This being said, the general thesis is still remarkably correct. The act of creating tools as a form of labour, helped influence the social and physical development of man which led to creating new tools, which helped influence the social and physical development of man which led to creating new tools...
In the main, we study this progression of material conditions (base) and what develops from it (superstructure). A feudal base creates a superstructure in which an aristocracy runs everything, for instance.
This isn't true of livestock. They fall outside our area of study and our concern. Generally, and always from my anecdotal experience, when Marxists do broach the animal question it comes down to how changing our relationship with livestock will affect human material conditions and what develops from it. The animals are as incidental in the analysis as lamps or grass or something.
In this sense, it's no different than any other classic philosophy or current economic question.
Alis Volat Propriis; Tiocfaidh ár lá; Proletarier Aller Länder, Vereinigt Euch!