Reasons why people leave Ireland are integral to the discourse of Irish migration. Notions of exile or forced migration predominate to such an extent that there is barely room for other ideas. The validity of exile or forced migration concepts are threatened if the gradual emergence of a migration culture is acknowledged. Using a case study of Irish migrants to Western Australia post-1945, the existence of a migration culture is examined and reinforced by evidence from the survey group. Associated with the idea of choosing rather than being forced to leave Ireland, the book also focuses on the influence of destination as a positive factor in migration. This is in contrast to the more common focus on loss when leaving Ireland favoured by writers about the diaspora. In an Australian context, the book examines Irish migrants and their connection to their chosen country in addition to their disconnection from Ireland. This innovative analysis moves the debate about causation of Irish migration away from nineteenth century concepts. It will be of interest to both scholars and members of the Irish diaspora.