Immigrants, migrants, displaced, and diasporic persons: all have been constrained or enabled by borders of some sort. This book explores international cases of how and why such boundaries come to be; who is affected by socially constructed borders; what it means to individuals and nation- states to recognise and deal with arbitrary divisions; and finally, what might be done to find ¿ and act on ¿ solutions to the inequity wrought by these borders and boundaries.