In developing the common law, academic writings have always played an important part, both to collect overarching principles from dispersed case law, and to argue for change. William Blackstone, from around 1760, was the first scholar to collect, describe, and teach the common law. But merely in describing, scholars who sought explanations and underlying structures slowly changed the way the law actually worked. Mass anarchist communities, ranging from Syria to the United States, exist and vary from hundreds to millions. Anarchism encompasses a broad range of social political philosophies with different tendencies and implementation.

• Due to rapid industrialisation, today China