Mostly postmodernism/poststructuralism is not a theoretical viewpoint or vantage point, although it is often positioned as such in order to serve as a contrasting argument, e.g., in academic circles where an existing theoretical perspective has been established.
It is instead a tactic. If the arguments that comprise its tactics were to be taken as theoretical axioms, postmodernism/poststructuralism would be the theory that nothing can be said to have any meaning, for the following reasons:
_ The meaning of anything must be meaning perceived. Someone has to do the perceiving. Problem is, the meaning therefore is peceived only through the lens of the perceiving person’s experience, or, in postie nomenclature, is an artifact of the perceiving person’s location in history (time, culture, social status, situation, etc)
_ The perceiving person is entirely “socially constructed”, meaning that there is no pure experience of “experiencing things as they are” lying underneath all of the contextual biases caused by location in history–sorry, that’s all there is. You are a product of your environment and that is all that you are.
_ Similarly, the “anything” does not have an underlying layer of “true meaning” that is simply distorted or obscured by people’s biases and situation-specific viewing angles. Meaning is always “socially constructed” as well. Thus, things mean what they mean only as an artifact of history, and nothing is intrinsic. (You can’t even posit that there would be a de facto objectivity if we could all get together and compare notes and distill a description from combining all of our experiences, since no matter how many of us there are, we, collectively or individually, are just products of our environment).
_ The process of communicating and comparing notes about what is perceived (as mentioned above) is always and inevitably a power struggle known as a “discourse” in which the act of defining or putting something into words or attributing meaning to it is necessarily the triumphing of one perspective over others, none of which are any more “right” than the others, but all of which are “of” the experience and social location of those whose descriptions win out, and all of which go on to “construct” our social experience of reality. Everything is power struggle, nothing is meaning.
As has been said elsewhere (and fairly often), postie crit is a dismantling tool. This kind of thinking lets you tear apart assertions but it isn’t much good if you want to make assertions of your own. And if you were to try in all seriousness to adopt it as the foundation for your political and sociological world-view, you’d end up in a pile of disassembled belief systems and no glue to put anything together. (The minute you open your mouth you are just spouting the results of your socio-historical location and mirroring a bunch of socially constructed meanings which by definition can’t correlate to any intrinsic meaning since none exists, and furthermore you are by definition attempting to stomp out someone else’s view or opinion or perspective through your act of putting stuff into words)