I came across a very interesting thesis by Robert Rorabeck from Florida State University the other day.
"Tolkien's Heroic Criticism: A Developing Application Of Anglo-Saxon Ofermod To The Monsters Of Modernity"
(Ofermod means "overmastering pride")
In summary, it posits that Tolkien was primarily concerned with the elevation of man-made social systems over a divine and moral law, and he worked to deconstruct such systems as dangerous and flawed ideology that would inevitably lead to the downfall of man.
In its 100 pages it touches on many things we have discussed before - including his morality code, social commentary and allegories, heroism, homosociality.
I can't remember the last time I read a Tolkien thesis that is so well written, researched and encompassing.
Enjoy.