The Kantian philosophy is no more than at best a half-secularized version of such a theocratic ethics, with "Reason" in the place of God. This does not amount to much more than a change of names.

Can one understand politics without understanding history, especially the history of political thought, and will this distinguish political philosophy from some other kinds of philosophy (such as, perhaps, logic) to which the study of history is not integral?

Neither the good nor the true is self-realizing, so it is not generally a sufficient explanation of why people believe that X is true, or of why people do Y that Y is good.

The Kantian philosophy is no more than at best a half-secularized version of such a theocratic ethics, with "Reason" in the place of God. This does not amount to much more than a change of names.

In some central and important cases, ... the existence of specific power relations in the society will produce an appearance of a particular kind. Certain features of the society that are merely local and contingent, and maintained in existence only by the continual exercise of power, will come to seem as if they were universal, necessary, invariant, or natural features of all forms of human social life, or as if they arose spontaneously and uncoercedly by free human action.

When Catullus expresses his love and hate for Lesbia, he is not obviously voicing a wish to rid himself of one or the other of these two sentiments. Not all contradictions resolve into temporal change of belief or desire.

A major danger in using highly abstractive methods in political philosophy is that one will succeed merely in generalizing one's own local prejudices and repackaging them as demands of reason. The study of history can help to counteract this natural human bias.