There are occasions when Baxter and I find ourselves advising Can Bobby thusly: "I'm sure we're all very familiar with the term Discourse Analysis, you don't have to go on about it, all we really need is a short reminder." Hence: "Language is not a window on the world, it's an action that shapes and is shaped by our social lives. Discourse Analysis is the study of language as an action in our social lives that builds the world as we understand it."
The key words are "builds the world as we understand it." Language is not deterministic, language doesn't make the world, it's an action that produces an understanding of the world, it produces the understanding of the world we carry around in our heads.
So, as one who binds to the left I might well be a Bindweed. And as one who binds to the Right you, no offence intended, may be that invasive species a Honeysuckle. If we ask why do I bind left and you bind right? The answer is closer to "Language is an action in our social lives that builds the world as we understand it," than it is to "Can't help ourselves, I evolved bindweed, you evolved honeysuckle."
Ergo, Justice isn't an objective truth as many would prefer it to be, like Liberal Democracy it's an Ironic Paradox.