This book explores global migration as a central reality of the modern world and highlights it as an important context for Christian mission. It shows how movement across nations raises questions of identity, belonging, and faith, and encourages readers to see migrants not as distant subjects but as people within God’s ongoing story. Drawing on biblical themes from Abraham to the early church, it presents diaspora and displacement as opportunities for encounter, relationship, and witness. The book also offers practical guidance for churches and individuals on building relationships, showing hospitality, and engaging meaningfully in multicultural settings. Overall, it calls believers to recognize the presence of the nations in their everyday environments and to participate faithfully in God’s mission among them.