The UK has 5 of the top 50, the US has 18 of the top 50, Australia has 6 in the top 50, Canada has 3. Meanwhile Switzerland has 2, as does France. Ireland has 1. And the Netherlands has 1. Others are listed too.
What surprises is the lack of any leading African University to find a place on the list.
But of course such lists are utterly meaningless. Good students go to unlisted schools and real and total dull minded prats go to (and in some cases teach at) highly ranked institutions. Education isn’t about the where, it’s about the who.
(And it’s sort of surprising seeing the HP just coming to this story when it’s been around since early in the year. Oh well).