All of whose founders had at least one parent with a PhD or law degree. And who also had either exceptional access to early education (private schooling) or ext

All of whose founders had at least one parent with a PhD or law degree. And who also had either exceptional access to early education (private schooling) or extra-curricular education (HP lecture series) or both. Unless by "doing something right" you mean "continuing to provide an environment where the already-successful can have successful children." :-)