"The Church in America is at the "low ebb" of society when it comes to its overall impact on today's culture and is in need of "reformation" so that it can once again be the "salt" and "light" that Jesus called it to be, evangelical author and social critic Os Guinness said."
Os Guinness is an Anglican. The Anglican church is unbiblical both in foundation (founded on sexual immorality by King George VIII) and in doctrine (works righteousness, the Apocrypha).
Guinness of course, gets into Covenantalism and tries to apply it to America, which is wholly wrong (that's another post for another day).
While he's rebuking America's churches for not being influential enough--and their need for reformer, his own church is liberal. It has women in leaders and is Charismatic. This is highly hypocritical.
A look at his church, The Falls Church Anglican