What about war...
War is an organized and often prolonged conflict that is carried out by states and/or non-state actors. It is characterised by extreme violence, social disruption, human suffering, and economic destruction.
In 2003, Nobel Laureate Richard E. Smalley identified war as the sixth (of ten) biggest problem facing the society of mankind for the next fifty years.
In the 1832 treatise On War, Prussian military general and theoretician Carl von Clausewitz defined war as follows: "War is thus an act of force to compel our enemy to do our will."
Nations customarily measure the ‘costs of war’ in dollars, lost production, or the number of soldiers killed or wounded. Rarely do military establishments attempt to measure the costs of war in terms of individual human suffering. Psychiatric breakdown remains one of the most costly items of war when expressed in human terms.
This book contains thoughts (expressed in words) of many remarkable personalities, and will give you a closer view of what war means.