Acknowledging migration as a social construct, this publication explores the link between Migration and Development as a field of policy and practice in the international arena. It provides a historical overview of how the understanding of this link has changed throughout the 20th and 21st centuries. The Migration and Development nexus entails that migration affects the outcomes of sectoral policies, as much as sectoral policies affect migration dynamics. In this framework, integration is a key aspect of the Migration and Development nexus. In particular, this publication illustrates how the Italian approach to Migration and Development has recognized integration as a fundamental part in the equation, showing the benefits of adopting systemic, programmatic and policy approaches that take migration, development and integration simultaneously into consideration.