Well, right, it's not even a unique document. Multiple, equally valid birth certificates can exist. As a form of ID, it's not great. A passport or drivers lice

Well, right, it's not even a unique document. Multiple, equally valid birth certificates can exist. As a form of ID, it's not great. A passport or drivers license is much better because the issuer put a picture on it and already did the checking to make sure the birth certificate and social security card were valid.