[pdonis]

> Classical liberalism uses the assumed equality of all people to argue that the people are capable of and ought to engage in self rule.

"Equality" in the sense of equal rights, yes. Not in the sense of equal capabilities. Classical liberalism, as exemplified in documents like the Declaration of Independence, was based on the idea that, even though people have differences in ability, those differences do not give any person a right to rule over any other person. That's where the justification for "self rule" comes from.

Since this reasoning already recognizes that people have differences in ability, "science" showing that people have differences in ability (did we really need "science" to tell us this? isn't it obvious?) does not invalidate the reasoning at all.