Know Lumen Gentium Chapter III: ON THE HIERARCHICAL STRUCTURE OF THE CHURCH AND IN PARTICULAR ON THE EPISCOPATE

Some will tell you that today the Church is no longer "hierarchial."  They are wrong.  And many of them are twisting what the Vatican Council has taught and already reaffirmed and made clear for the modern era. 

See for  yourself and be informed and have this as a ready answer:

http://www.vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_const_19641121_lumen-gentium_en.html