International relations, 1648–1814 and cultural achievement. Historian Frederick Nussbaum says it was: The worst came during the Thirty Years' War, 1618–1648, which had an extremely negative impact on the civilian population of Germany and surrounding areas, with massive loss of life and disruption of the economy and society. Scholars taking a "realist" perspective on wars and diplomacy have emphasized the Peace of Westphalia (1648) as a dividing line. It ended the Thirty Years War (1618–1648), where religion and ideology had been powerful motivating forces for warfare. Westphalia, in the realist view, ushered in a new international system of sovereign states of roughly equal
Portuguese Restoration War at the negotiations for the European settlement-of-settlements, the new "realpolitik" of the peace of Westphalia (1648). With this treaty and the end of hostilities in Catalonia in 1652, Spain was again ready to direct its efforts against Portugal, but it faced a lack of men, resources, and, especially, good military commanders. By 1662, Spain had committed itself to a major effort to end the war. John of Austria the Younger, Philip IV's illegitimate son, led 14,000 men into Alentejo, and, the following year, they succeeded in taking Évora, the major city of the region. The Portuguese, under António Luís de