This chapter looks at the concept of global identity as opposed to national identity. It begins by looking at a range of longitudinal studies between 2000 and 2010 relating to adolescent identity formation. The studies point towards a growing of identity and coherence of the life story of narrative identity during adolescence. ‘Adolescents with a mature identity typically show high levels of adjustment and a positive personality profile, live in warm families, and perform well at school’ (Meeus, 2011, p. 75). The question of culture and identity are inextricably intertwined, and the case for and against a common or global culture is outlined and discussed before moving to the empirical data from the international schools study in the remaining four chapters.