C.S. Lewis's Crisis of Faith

Here are comments I made on the C.S. Lewis wikipedia article.

Would it be appropriate to expand on Lewis's crisis of faith towards the end of his life in its impact on his theological thinking? It was more than just the death of Joy but also a debate that he had with G.E.M. Anscombe. While Lewis didn't disavowal his apologetics, not did he publish or preach any more apologetics for the remainder of his life. The article seems suggest that his "trilemma" and "universal morality" ideas were the apotheosis of his thinking on these matters, while the reality may have been more complex. (There is a paragraph of this encounter in the Wikipedia entry on Elizabeth Anscombe.)

On whether we should use Lewis's or Lewis'.

Strunk and White's Elements of Style support the construction Lewis's. The example they use is Charles's friend.