Before reading "Celebrating Middle-Earth" -- and before reading other commentary works on LOTR [Lord of the Rings] -- I saw Tolkien as a defender of Western Civilization -- as well as warning of excess -- such as power, greed, warfare and over-mining. LOTR [and "The Silmarillion"] is Creatively composed of some main cultural components of "The West" -- such as various Judeo-Christian, Greco-Roman, Celto-Nordic, Finnish, and even Amerindian aspects. This includes cultural-aspects, language-aspects -- and saga-apects of individuals making freewill choices as they venture and adventure into danger to save Middle-Earth. But, yes, "Celebrating Middle Earth" does have a strong bias towards "Christendom" -- as did "The West" until recently. "Christendom" itself is composed of various influences -- even likely some from Old Egypt -- but including many of the very same aspects as LOTR.
By all that I have seen, Tolkien did view himself as a defender of "The West" -- and was a practicing Catholic -- yet was very inclusive of those cultures already noted. This Great Author despised intolerence as noted by other reviewers. That so many folks of various backgrounds can find Inspiration via LOTR and Tolkien -- shows his rich, wide and deep aspects -- including the six authors of the chapters of this book. The very first chapter is authored by the editor, John G. West, and has the same title as the subtitle of the whole book -- "The Lord of the Rings as a Defense of Western Civilization" -- and makes this case rationally in detail. The front page has an explanation at bottom -- "An Examination of the Writings of J. R. R. Tolkien as a Defense of the Literary, Philosophical, Political, and Religious Foundations of Western Society" -- that I hope others will verify via reading this book.
When Tolkien first studied and wrote, it was still broadly understood that "The West" and "Christendom" overlaped greatly, if not totally -- as there were Greek, Orthodox, Armenian, Coptic and Celtic variants of "Christendom". Nowadays, new variants of the old ones are developing in large parts of the world -- along with the continuing momentum, of "The West" -- which seems to do much better in a non-imperial era and way. For those that favor individualism, responsibilty, opportunity, democracy, diversity, natural and human law, "The West" and its momentum may be worth defending -- in an interlinked richly cultured world. This little book is a great intoduction to Tolkien and LOTR study that seems to follow Tolkien closely -- including his "Personal Theology" as well as other major aspects +++