> expanded quite rapidly into including racism and then labor practices

The jump you referring to is a quote with a reference attached. But in short terms so that might be useful to Google, but in short the concept of intersectionality means that things like feminism and anti-racism and other forms of prejudice can potentially be inter-related in terms of using different forms of marginalization as tools to enforce a hierarchy.

> which I’m very much struggling with the jump; the link appears to be that both involve power relationships? And I’m not really clear why this doesn’t extend further into basically all of human suffering in any society. Or perhaps extended upwards and encapsulate systems-thinking and any graph-relationship whatsoever

Not to really go off the rails too much but you sort of just given a not too bad description of anarchism, so like yeah it wouldn't necessarily be a leap to extrapolate that and plenty of people do