Scripture shows us that how we view the world, what we know, affects who we are, our character, out of which we act. Rather than merely treating the actions, Schaeffer adds to what we know about our culture, our human nature, our God, and how all three are related, and the additional knowledge has the capability to produce in the reader a very Godward transformation.
This work is prophetic. Written in the 1970's, it is still current, and what's more, it has correctly deduced and defined the rise of postmodern Christianity, which is integral to the emerging church movement, years beforehand.
For the Christian who is frustrated with church, begin here. Understand who God is, who you are, and who your church is called to be.
"To young people who want a revolution, let me say this: You cannot be a revolutionary simply by some minor thing like letting your hair grow and cultivating a beard [or, in this day and age, by piercing yourself and commissioning a tattoo--or several]. To be a real revolutionary, you must become involved in a real revolution--a revolution in which you are pitted against everybody who has turned away from God and His propositional revelation to [humankind]--even against the user of god words. This is a revolution in which we may again hope to see good results, not only in individuals going to Heaven, but in Christ who is Lord becoming Lord in fact in this culture of ours to give us even in this fallen world something of both truth and beauty."
--F.A. Schaeffer, "The Church at the End of the Twentieth Century"