Question: Which war was being fought when C.S. Lewis wrote the book whose chapter shares a title with the band Wild Sweet Orange's 2008 album?

Context paragraphs:
The Whale EP: The Whale EP is a self-released EP by Wild Sweet Orange.  It contains 5 songs and has a running time of 20 minutes and 20 seconds.

We Have Cause to Be Uneasy: We Have Cause to Be Uneasy is the first and final full-length album by American indie rock band Wild Sweet Orange and was released on July 29, 2008, available on CD, Vinyl, and via iTunes.  "We Have Cause to Be Uneasy" is the title of the fifth chapter in C.S. Lewis' book, "Mere Christianity".

The Runaway Found: The Runaway Found is The Veils debut album, released on 16 February 2004.  The record was preceded by several singles, from "More Heat Than Light" (November 2002) to "The Wild Son" (January 2004).  The last single "Lavinia" was released in November 2003, alongside a first promotional version of the album which featured a different running order and track list.  In fact "...& One of Us Must Go" and "Wires to Flying Birds" did not make the final version and were later replaced by "The Wild Son" and "The Valleys of New Orleans".  Because of its long gestation (the recording sessions started straight after the band's first deal with Blanco Y Negro in 2001) the record has three different producers: Matthew Ollivier (tracks 3, 4, 6, 9, 10), Bernard Butler (tracks 1, 2, 5, 8) and Ken Nelson (track 7).  The fourth song on the set, "More Heat Than Light", gives credits to Finn's father Barry Andrews as co-author.  According to the booklet notes the last song of the set, "The Nowhere Man", is taken from the 1954 novel by C.S. Lewis "The Horse and His Boy".  The song "Vicious Traditions" was featured during the end credits of the 2007 film "Mr. Brooks".

The Company They Keep: The Company They Keep: C. S. Lewis and J. R. R. Tolkien as Writers in Community (2007) is a non-fiction book written by Diana Pavlac Glyer, an Inklings scholar and English professor at Azusa Pacific University.  "The Company They Keep" challenges the commonly held belief that the Inklings did not influence each other through a detailed and engaging examination of both published and unpublished works, papers, and letters written by J.R.R. Tolkien, C.S. Lewis, Charles Williams, Owen Barfield, Warren Lewis and the lesser-known writers who comprised the Inklings.

The Personal Heresy: The Personal Heresy is a series of articles, three each by C.S. Lewis and E. M. W. (Eustace Mandeville Wetenhall) Tillyard, first published on 27 April 1939 by Oxford University Press and later reprinted, also by Oxford University Press, in 1965.  The book has been reprinted in 2008 by Concordia University Press with an Introduction by Lewis scholar Bruce L. Edwards and a new Preface by the editor, Joel D. Heck.  The central issue of the essays is whether a piece of imaginative writing, particularly poetry, is primarily a reflection of the author's personality (Tillyard's position) or is about something external to the author (Lewis's position).  The two positions may be summarized briefly as the subjective position (Tillyard) and the objective position (Lewis).  In general, Lewis attempts to keep poetry within the reach of the common person, while Tillyard thinks of the poet as a person who is "a cut above the common person."

Out of the Silent Planet (album): Out of the Silent Planet is the debut release from King's X.  The title of the album comes from that of a book by C.S. Lewis, an author favored by band members Ty Tabor and Jerry Gaskill.  "Out of the Silent Planet" is also the title of the first track from the follow up album "Gretchen Goes to Nebraska".  The cover art features the skyline of Houston with the southern out line of the state of Texas.

Wild Sweet Orange: Wild Sweet Orange was an American indie rock band from Homewood, Alabama.  In early 2008 their song "Land of No Return" was featured on Grey's Anatomy.  The band performed the song "Ten Dead Dogs" live on the Late Show with David Letterman on June 23, 2008.  Their first full LP, "We Have Cause to Be Uneasy", was released on July 29, 2008.  Wild Sweet Orange has opened for bands such as Counting Crows, Guster, Augustana, and Gringo Star.

Max McLean: Max McLean is the founder and artistic director of Fellowship for Performing Arts, a New York City-based producer of live theater from a Christian worldview.  McLean conceived, adapted, produced and starred in "The Screwtape Letters", a play based on the book by Oxford and Cambridge scholar, author and fantasy writer C.S. Lewis.  His stage adaptation of Lewis’ "The Great Divorce" launched its national tour in late 2013.  McLean adapted, co-directed and starred in "C.S. Lewis Onstage: The Most Reluctant Convert", and co-wrote and produced "Martin Luther on Trial".  McLean also is the narrator of The Listener's Bible.

Mere Christianity: Mere Christianity is a theological book by C. S. Lewis, adapted from a series of BBC radio talks made between 1941 and 1944, while Lewis was at Oxford during the Second World War.  Considered a classic of Christian apologetics, the transcripts of the broadcasts originally appeared in print as three separate pamphlets: "The Case for Christianity" ("Broadcast Talks" in the UK) (1942), "Christian Behaviour" (1943), and "Beyond Personality" (1944).  Lewis was invited to give the talks by the Rev. James Welch, the BBC Director of Religious Broadcasting, who had read his 1940 book, "The Problem of Pain".

Letters to Malcolm: Letters to Malcolm: Chiefly on Prayer is a book by C.S. Lewis posthumously published in 1964.  The book takes the form of a series of letters to a fictional friend, "Malcolm", in which Lewis meditates on prayer as an intimate dialogue between man and God.  Beginning with a discussion of "corporate prayer" and the liturgical service, Lewis goes on to consider practical and metaphysical aspects of private prayer, such as when to pray and where, ready-made prayer, petitionary prayer, prayer as worship, penitential prayer, and prayer for the dead.  The concluding letter discusses "liberal" Christians, the soul and resurrection.

Supporting paragraphs: We Have Cause to Be Uneasy Mere Christianity
Answer: the Second World War