More than 30 countries grant unrestricted birthright citizenship based on the ‘jus soli’ principle – and nearly all of them ...

However, in most cases these countries turned toward a different type of birthright citizenship that has its roots in European law: jus sanguinis (‘right of blood’), which is generally based ...

From my review, it does not appear that any country strictly uses jus soli or jus sanguinis. Rather ... could not be U.S. citizens. This is a map from the International Monetary Fund that shows ...