There are two things which a democratic people will always find very difficult—to begin a war, and to end it.
 Alexis de Tocqueville, Democracy in America (1840). copy citation

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Author Alexis de Tocqueville
Source Democracy in America
Topic war peace democracy
Date 1840
Language English
Reference
Note Translated by Henry Reeve
Weblink http://www.gutenberg.org/files/816/816-h/816-h.htm

Context

“War could only be a remedy for a people which should always be athirst for military glory. I foresee that all the military rulers who may rise up in great democratic nations, will find it easier to conquer with their armies, than to make their armies live at peace after conquest. There are two things which a democratic people will always find very difficult—to begin a war, and to end it.
Again, if war has some peculiar advantages for democratic nations, on the other hand it exposes them to certain dangers which aristocracies have no cause to dread to an equal extent. I shall only point out two of these.” source
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