We sometimes here the comment "We don't know who is a kohen anymore." This work provides much-needed clarity to the soundness of the chazakah of the greater majority of kohanim today - specifically of those who we know and recognize in our communities, those kohanim families who are known to us, were known to our parents, and to our grandparents going all the way back "lemaalah bakodesh" into the holy generations of our history.