Perhaps [weasel-word!] something has occurred in the history of the concept of structure that could be called an “event,” if this loaded word [loaded according to whom?] did not entail a meaning which it is precisely the function [is this really its only function?] of structural–or structuralist–thought [which is it?] to reduce or to suspect [again, which?]. But let me use the word “event” anyway, employing it with caution and as if in quotation marks. In this sense, this event will have the exterior form of a rupture and a redoubling [why? Unpack this].
It would be easy enough to show [then show it! This is a big generalization that you never support!] that the concept of structure and even the word “structure” itself are as old as the episteme [is this a reference to Foucault? In that case, cite]–that is to say, as old as western science and western philosophy [this is a big claim, citation?]–and that their roots thrust deep into the soil of ordinary language, into whose deepest recesses the episteme plunges to gather them together once more, making them part of itself in a metaphorical displacement [unclear -- I think I see what you're getting at, but it could be expanded and unpacked a bit more]. Nevertheless, up until the event which I wish to mark out and define [maybe you should lead off with what this event is supposed to be, rather than making the reader wait? I'm already losing the thread], structure–or rather the structurality of structure–although it has always [careful with these generalizations] been involved, has always been neutralized or reduced, and this by a process of giving it a center or referring it to a point of presence [this feels jargony to me], a fixed origin. The function of this center was not only to orient, balance, and organize the structure–one cannot in fact conceive of an unorganized structure–but above all to make sure that the organizing principle of the structure would limit what we might call the freeplay of the structure [what does this mean? Unpack]. No doubt [this does not seem as immediately obvious to me] that by orienting and organizing the coherence of the system, the center of a structure permits the freeplay of its elements inside the total form. And even today the notion of a structure lacking any center represents the unthinkable itself [this seems a bit overblown -- maybe nuance?].