Who is to Blame for the Secularization of our Culture?

“Because of their two-realm theory (seeing all things as either “sacred” or “secular”), Christians have themselves to blame for the rapid secularization of the West.

If political, industrial, artistic, and journalistic life, to mention only these areas, are branded as essentially ‘worldly,’ ‘secular,’ and part of the natural domain of ‘creaturely life,’ then is it surprising that Christians have not more effectively stemmed the tide of humanism in our culture?”
-Al Wolters, Creation Regained, p. 54