It has failed? 100's of millions would disagree... Isn't their division within the Catholic Church as well...
The Church needs a visible head.
Isn't the living Christ head of the church or is he still hanging on the cross?
The Bible alone does not suffice, for there are endless disagreements on how to interpret it.
Even within the Catholic Church the Bible has different interpretations
Someone must exist to whom all turn and who all agree will resolve the differences after listening.
Why, our salvation is not dependent on consensus...
Your tag line is beautiful.
The Stone that the builders rejected has become the chief corner stone. The LORD has done this and it is marvelous in our eyes!