The MI4 conference focuses on understanding migration as one of the key developmental, demographic, cultural, and political challenges facing contemporary societies. Particular emphasis is placed on modern forms of mobility, return migration, the diaspora, immigration, integration, the labor market, identity, and the role of public policies in shaping sustainable migration processes. The conference aims to connect scientific research, professional expertise, and public policy perspectives, while creating a space to discuss migration as a resource, a challenge, and a developmental opportunity for Croatia, the region, and Europe.