War can really cause no economic boom, at least not directly, since an increase in wealth never does result from destruction of goods.
Ludwig von MisesWar is harmful, not only to the conquered but to the conqueror. Society has arisen out of the works of peace; the essence of society is peacemaking. Peace and not war is the father of all things. Only economic action has created the wealth around us; labor, not the profession of arms, brings happiness. Peace builds, war destroys.
Ludwig von MisesThe greater productivity of work under the division of labor is a unifying influence. It leads men to regard each other as comrades in a joint struggle for welfare, rather than as competitors in a struggle for existence. It makes friends out of enemies, peace out of war, society out of individuals.
Ludwig von Mises