There are trends that suggest a bias in those who become Ageless.  It’s genetic of course.  We can’t look at someone and say they will be.  We can only say they have a better chance.  We don’t know all of the variables yet.  But one of the variables is ancestry.  There are more Ageless with Celtic blood than of any other genetic group.  There are also many American-Indians.  Most of the rest are European.  There are very few African or Asian Ageless.  We don’t know why.