The concept of “individualism” as separate from social class and other structured identities - for example, politics that “everyone is different” and that we are all isolated actors on our own terms is both idealistic, incomplete and ideological.
It is idealistic in its construction of individual identity as a mental construct or a construct purely ‘from the self’ - from ‘ideas’.
It is incomplete in its exclusion of social position from its understanding - social position being a vital modifier through which both the external world and the self is understood: we may all be our “own people” - but our experience of this “difference” is subjugated to a (relative) unity of perception and understanding formed out of societal positioning.
It is ideological through its blatant expression of and basis in core capitalistic concepts of the individual’s sovereignty (contra understandings of class conflict - ie understanding that there are roughly coherent groups which stand in opposition to one another) and the “normalising” view that, in this context, suggests that all have the same societal experience (generally white, male, cis, etc) of their internal individuality.
I’ll probably add to or edit/improve this post later. I’ll reblog it with the edits I do.