Answer to Question 1
The social sources of violence can be organized into three categories: characteristics of the structure of society that serve as preconditions to violence, the frustrations that these preconditions can create in people that push them toward violence, and mediating factors that increase the likelihood that people will react violently to frustration.
Answer to Question 2
War can have a severe impact on a nation's economy. The destruction of factories, railroads, and other economic resources can be terribly damaging, but economic problems are created even in combatant nations that suffer little or no such physical destruction. One source of economic problems is that resources devoted to the war effort must be withdrawn from some other economic realm. Depending on the state of the economy, wars can also produce high inflation, high interest rates, recessions, and other economic damages that negatively affect practically everyone.