The history of capitalism and the state is the history of attempts to abolish them and establish a free society without domination and exploitation. Revolutionary workers in the nineteenth and early twentieth centuries believed that another world was possible. It is still possible today. One of the main social movements that attempted to overthrow capitalism and the state during the nineteenth and early twentieth centuries was anarchism. Members of the historical anarchist movement not only attempted to change the world but also produced an elaborate body of ideas that guided their actions. This book is concerned with explaining what their ideas were. Historians sometimes unearth old ideas from the past because they are an interesting way of gaining insight into a different time and place. This is not my principal motivation. I wrote this book because I want to live in a society in which everyone is free. I am convinced that, if we are to achieve this goal, it is important to know the history of previous attempts to do so. My hope is that, through learning about how workers in the past sought to emancipate themselves, workers alive today can learn valuable lessons and develop new ideas that build on the ideas of previous generations.

How to define anarchism is a contentious topic and will be discussed in depth in chapter 1. For the purposes of this book, it will be understood as a form of revolutionary antistate socialism that first emerged as a social movement in late nineteenth-century Europe within the International Workingmen’s Association between 1864 and 1872 and the subsequent Saint-Imier International between 1872 and 1878. During and after its birth as a social movement, it spread rapidly to North America, South America, Asia, Oceania, and parts of Africa through transnational networks, print media, and migration flows. I will focus exclusively on anarchist collectivists, anarchist communists, and anarchists without adjectives who were agnostic about the nature of the future society but advocated the same strategy as anarchist collectivists and anarchist communists. I do not claim that this is the one true form of anarchism. It is only the kind of anarchism I am focusing on.