We belong to a world of people on the move - in 2015, 244 million people lived outside their country of origin, including 20 million refugees. These migrants and families can create vibrant diaspora communities that can become agents of social, political, cultural and economic change in both their homelands and the societies they have adopted. But they can also be conflicted and conservative, bringing with them the conflicts of their homeland. Their energies, insights and people-to-people connections have often been overlooked by their new communities, but policymakers are becoming aware of the potentials they harbor: in supporting international development, peacebuilding, human rights advocacy, diplomacy and even trade. Is there more to diversity than interesting new places to eat? How do diaspora communities become active in processes of local and global politics and what can they achieve? And what role do the conflicts they flee and those they bring with them play in their new lives?