If your objective is to list works that shaped the Western World, then you must include Two Treatises of Government by Locke.
And how does Lord of the Rings fit into that list?
"And yet less thanks have we than you. Travellers scowl at us, and countrymen give us scornful names. 'Strider' I am to one fat man who lives within a day's march of foes that would freeze his heart or lay his little town in ruin, if he were not guarded ceaselessly. Yet we would not have it otherwise. If simple folk are free from care and fear, simple they will be, and we must be kept secret to keep them so."
Consider the current situation of President Trump writing an EO to keep terrorists out of the country, and some blind judges overturn the EO because they feel it's so cruel to refugees. Does this quote not capture the thinking of both President Trump (represented by Strider) and the judges (represented by the fat man)?
JRR Tolkien's formative experiences occurred on the battlefields of WWI, and that is reflected in every volume of LOTR. Perhaps fantasy isn't your thing, but just be aware that lifelong fans of LOTR do not regard it as mere escapism. The books hold keen observations about the forces that shape human events and societies. I first read the series when I was 15, and I reread it about every 5 years; each time, I find some new insight hidden within its pages. I think that I will never run out of new discoveries in LOTR.