Stephen's publications addressed the increasingly important issue of forced migration to Europe (Castles & Van Hear, [11]), including I States of Conflict: Causes and Patterns of Forced Migration to the EU i (Castles et al., [9]). Stephen Castles, who has been a leading migration scholar and migration theorist for five decades, has passed away aged 77. I Immigrant Workers and Class Structure in Western Europe i (Castles & Kosack, [8]) - his first major contribution to the field - was very influential and made Stephen's reputation within the global migration research community. [Extracted from the article]