Introduction
This introductory chapter sets out the book's purpose, which is to show how the ebb and flow of Spanish anarchist migrations to Argentina helps explain the development of both a transnational anarchist ideology and related organizations that connect these two countries. It follows the lives, careers, ideas, influence, and travel of dozens of individuals who moved between these two countries in the decades around the turn of the twentieth century. The life stories of individual immigrants allow us to explore their movements and understand how supranational links influenced the growth of the anarchist movements in Spain and Argentina. This study encompasses the period between 1868, when the ideas of Russian anarchist Mikhail Bakunin first became known in Spain, and the end of the Spanish Civil War, after which the regime of Generalíssimo Francisco Franco and the Second World War effectively ended the relationship between these two countries' anarchist movements. An overview of the subsequent chapters is also presented.