A “nation” is a community, and without conducting a full investigation into every individual birth, the two main indicators that a child will likely have strong ties to a national community are:
the parents already belong to that national community
the parents reside permanently in the country. Almost all countries in the mid shade of blue use this criteria for restricted birthright.
Why should descent be required?
A “nation” is a community, and without conducting a full investigation into every individual birth, the two main indicators that a child will likely have strong ties to a national community are:
“Required”? That’s looking at it from a funny angle. Descent is not usually lacking. Don’t you have parents?
Descent simply decides which citizenship you have, at first. That’s all. But if you feel you “require” a different descent, then I don’t know… :)