The Kingdom of God is Within You by Leo Tolstoy Chapter 6 Page 8

One section look at it as an incidental phenomenon, arising out of the special political situation of Europe, and consider that this state of things can be reformed without a revolution in the whole internal social order of nations, by external measures of international diplomacy. Another section regard it as something cruel and hideous, but at the same time fated and inevitable, like disease and death. A third party with cool indifference consider war as an inevitable phenomenon, beneficial in its effects and therefore desirable.

Men look at the subject from different points of view, but all alike talk of war as though it were something absolutely independent of the will of those who take part in it.

And consequently they do not even admit the natural question which presents itself to every simple man: