AP European History
An heir is a person legally entitled to inherit the property, titles, rights, and obligations of another upon their death. In the context of World War I, the concept of an heir is particularly significant as it relates to royal families and succession issues that contributed to the war's outbreak. The assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian throne, played a pivotal role in igniting the conflict, illustrating how personal and political legacies can lead to larger geopolitical crises.