Where?
Writes Mises in “Liberalism” (annotation mine):
Government by a handful of people […] depends on the consent of the governed, i.e., on their acceptance of the existing administration. They may see it only as the lesser evil, or as an unavoidable evil, yet they must be of the opinion that a change in the existing, situation would have no purpose. But once the majority of the governed becomes convinced [to overthrow the old regime] the days of the former are numbered. The majority will have the power to carry out its wishes by force even against the will of the old regime. In the long run no government can maintain itself in power if it does not have public opinion behind it […]
There is, therefore, in every form of polity a means for making the government at least ultimately dependent on the will of the governed, viz, civil war, revolution, insurrection.
But it is just this expedient that liberalism wants to avoid. There can be no lasting economic improvement if the peaceful course of affairs is continually interrupted by internal struggles. […] A fratricidal struggle like the French Revolution of 1789 cost a heavy loss in life and property. Our present economy could no longer endure such convulsions. The population of a modern metropolis would have to suffer so frightfully from a revolutionary uprising that could bar the importation of food and coal and cut off the flow of electricity, gas, and water that even the fear that such disturbances might break out would paralyze the life of the city. Here is where the social function performed by democracy finds its point of application.
**Democracy is that form of political constitution which makes possible the adaptation of the government to the wishes of the governed without violent struggles.**If in a democratic state the government is no longer being conducted as the majority of the population would have it, no civil war is necessary to put into office those who are willing to work to suit the majority. By means of elections and parliamentary arrangements, the change of government is executed smoothly and without friction, violence, or bloodshed. (p.41-42)
And latter on, speaking of the idealistic high hopes many have of democracy:
Since mankind entered the age of democracy with such high-flown expectations, it is not surprising that disillusionment should soon have set in. It was quickly discovered that the democracies committed at least as many errors as the monarchies and aristocracies had. The comparison that people drew between the men whom the democracies placed at the head of the government and those whom the emperors and kings, in the exercise of their absolute power, had elevated to that position, proved by no means favorable to the new wielders of power.
The French are wont to speak of “killing with ridicule.” And indeed, the statesmen representative of democracy soon rendered it everywhere ridiculous. Those of the old regime had displayed a certain aristocratic dignity, at least in their outward demeanor. The new ones, who replaced them, made themselves contemptible by their behavior. Nothing has done more harm to democracy in Germany and Austria than the hollow arrogance and impudent vanity with which the Social-Democratic leaders who rose to power after the collapse of the empire conducted themselves.
Thus, wherever democracy triumphed, an antidemocratic doctrine soon arose in fundamental opposition to it. There is no sense, it was said, in allowing the majority to rule. The best ought to govern, even if they are in the minority. This seems so obvious that the supporters of antidemocratic movements of all kinds have steadily increased in number. The more contemptible the men whom democracy has placed at the top have proved themselves to be, the greater has grown the number of the enemies of democracy. (p.43)