Introduction to the trilogy

Today I started re-reading The Lord of The Rings trilogy by J.R.R. Tolkien and I'll be posting informations from each chapter and my opinions about each one of them, concluding on my general opinion once I finish The Return of The King, again.
The Fellowship of The Ring begins with an introduction wrote by Sir J.R.R. Tolkien himself, the page right after the one containing the verses about The One Ring, which also opens the following two books:

  "Three Rings for the Elven-kings under the sky,
  Seven for the Dwarf-lords in their halls of stone,
  Nine for Mortal Men doomed to die,
  One for the Dark Lord on his dark throne
  In the Land of Mordor where the Shadows lie.
  One Ring to rule them all, One Ring to find them,
  One Ring to bring them all and in the darkness bind them
  In the Land of Mordor where the Shadows lie."

In the introduction, Tolkien tells us about his writing and the complications he found on its process.
The Lord of the Rings came to him as an inspiration of linguistic interest and as a way to give the needed historical backgrounds to the Elvish languages, making The Lord of The Rings a work of personal interest. His faith on the success of these books came down from a little to none as his advisors would demonstrate such little faith on the story. What pushed him through were the letters from the readers who wanted to know more about Hobbits.
What captivated me more in this introduction was the denial of any kinds of allegorical content in the whole story of The Lord of The Rings. Sir J.R.R. Tolkien accused himself as an enemy of any kinds of allegory and made it crystal clear that his story was not related to the "Real War" of 1939. But even more interesting was the one paragraph in which Tolkien described what The Lord of The Rings would have turned out to be if it was related to the reality in which he lived in:
The One Ring would have been captured and used against Sauron; it wouldn't have been destroyed but slaved, just as Barad-dûr (the tower of Sauron in Mordor) wouldn't have been destroyed but occupied. Saruman would have eventually found the needed allies in Mordor and learned how to create his own Ring of Power, in order to challenge Sauron. In this conflict, both parts would have demonstrated hatred towards the Hobbits, who wouldn't have survived that long, not even as slaves.
 Frodo about to destroy the Ring An example of Men's power in World War II
The author continues by saying that he prefers the story with its applicability to the thoughts and experience of the readers, which distinguishes itself from an allegory since the first lies on the reader's freedom and the second on the intentional control of the author.
J.R.R. Tolkien gave us the freedom to read The Lord of The Rings in a subjective way. In my personal view, I can apply the trilogy to my own concepts of the nowadays world and it helps me to get through with my daily life.