Therefore, ignorance of history often leads to fatuity in politics.

历史的无知，往往导致政治上的昏庸。

Therefore , ignorance of history often leads to fatuity in politics.

历史的无知,往往导致政治上的昏庸.

You have only to ask the questions to realise the fatuity of the idea.

你所问的问题只会了解到当时思想的愚昧.