This essay contains the essence of Lewis’ arguments in his fascinating short book ‘The Abolition of Man/Humanity’. http://www.amazon.com/Abolition-Man-C…
‘The Abolition of Man’, a series of three lectures that were published, has been rated as one of top ten non-fiction books of the 20th century, and is a booklet really. (It’s only three chapters long or two hour’s read).