Why were clubbed thumbs considered a sign of royalty?

Clubbed thumbs (defined as very short, round thumbs, that balloon at the end with wide, short and sometimes very thick nails) historically were thought of as a sign of royalty because they were a rare condition that was much more common in royale European blood lines ,than in general population. read more

Clubbed thumbs are historically thought of as a sign of royalty. This rare condition was much more common in royal European blood-lines than in the general population and was used as a factor in determining the pureness of the blood. read more