The problem,
lengualo , and I say this with all due love and understanding, is that you don’t understand why class is relevant to all the topics you mention, not that it isn’t relevant. And that’s understandable, because the neoliberal flavour of capitalism has created a way of understanding the world that starts and ends with the individual. The individual is responsible, the individual is actualised, the individual makes decisions, the individual has opportunities, strengths, weaknesses, successes and failures. Structural analysis of social problems has become just… forgotten. But don’t worry, urban is here to gradually guide you through it.
First things first — a class isn’t “thing”, it’s a relation. A class cannot exist without another class to compare it to. One class controls a social field, another is controlled. It’s this relation between classes that matters, not the class in and of itself.
Second, forget “middle-class” as one of those relations. It’s meaningless for structural analysis, it’s just something made up to sell things. What matters in class analysis, in class relations, is what interests the class has as a consequence of its power or lack thereof. Are you selling your labour wherein you provide a bit of a larger process, without making decisions about where that process begins, ends or operates? Do you have a level of control over your own activities but not over anybody else’s? Do you tell other people what to do on behalf of the owners? Or are you an owner? These groups are fundamentally in opposition to each other.
And all that has implications for what decisions are made by whom and when. Hell, it fundamentally sets the parameters of what is defined as a problem in the first place. Take climate change — who gets to decide what the nature of that problem is? For example, if the problem the individual consumers’ choices? Or is it the way that the nature of property and ownership are defined and put into legal practice? These are inherently class issues — they derive from the structures of capitalism.