The term "national idea" is an unclear one. One might think of it as a widely shared understanding among a people as to the desired way of life in their country, an idea that holds sway over the population. A unifying concept like that can be useful, but should never be created artificially or imposed top-down by the powers-that-be.
Aleksandr SolzhenitsynHuman nature, if it changes at all, changes not much faster than the geological face of the earth.
Aleksandr SolzhenitsynA decline in courage may be the most striking feature that an outside observer notices in the West today. The Western world has lost its civic courage . . . . Such a decline in courage is particularly noticeable among the ruling and intellectual elite, causing an impression of a loss of courage by the entire society.
Aleksandr Solzhenitsyn