Funny how success changes attitudes.
The Northern Dancer male line spent the 1990s and most of the first decade of the 21st century completing its conquest of the globe, while retreating on the continent of its birth. Of course, Northern Dancer himself was born in Canada and first achieved fame through his victories in the 1964 Kentucky Derby and Preakness Stakes, and he led the sire list in England four times but only once in North America.