A Network of Thrones: Kinship and Conflict in Europe, 1495–1918
利用欧洲王室亲属关系、君主制与战争数据库，研究发现统治者间亲属关系的意外断裂显著增加了战争频率与持续时间，而亲属关系的增长则有助于解释欧洲战争减少的趋势。
We construct a database linking European royal kinship networks, monarchies, and wars to study the effect of family ties on conflict. To establish causality, we exploit decreases in connection caused by apolitical deaths of rulers’ mutual relatives. These deaths are associated with substantial increases in the frequency and duration of war. We provide evidence that these deaths affect conflict only through changing the kinship network. Over our period of interest, the percentage of European monarchs with kinship ties increased threefold. Together, these findings help explain the well-documented decrease in European war frequency.