This conclusion presents some closing thoughts on the concepts covered in the preceding chapters of this book. The book provides an updated theoretical debate on territorial development and border cities. It presents a theoretical framework of the territorial development concept. The book argues that border cities can be regarded as anchors of development of cross-border regions, which are normally placed in the group of lagging regions, or places adversely affected by processes beyond their control. It focuses on economic development and innovation aspects associated with border cities and cross-border cooperation processes, based on recent Norwegian–Swedish cross-border experiences. The book reveals the extent to which arenas for dialogue across institutional and national borders could be constructed through the mobilisation of green business development. It recognises the fundamental role of the EU Interreg-A programmes to increase and coordinate available knowledge resources in the analysed border region.