I shall be deliberately controversial, although totally believe in the belief of a "One" world wide tree and the mission of Wikitree.
Connection to the tree is based within 100 steps of two USA born individuals, frankly unknown, and Queen Elizabeth 2.
That would suggest, hopefully I am wrong, the tree is based on a USA based family tree with everbody else attaching, providing you are connected within 100 steps to these unknowns & QE2. If that is so, it is wrong!
USA is the "New World", where many emigrated for a new life.
Researchers, I suspect, in Europe, Australia, New Zealand, Africa, and other parts of the world will not be able to connect to these unknowns & QE2.
Proven "Lead" connectors throughout the globe need to be established.
No doubt, I will receive a down vote, but first think about it