2The biggest challenges of the twenty-first century require global solutions. Focusing on three of the most urgent problems of our time--climate change, conflict, and poverty and inequality--Tu Rangaranga introduces the notion of global citizenship, and what it means to be an active citizen in today's world. If we are fundamentally linked to people around the globe by the clothes we wear, the phones we use, and the resources we consume, what does this mean for the rights and responsibilities that underpin citizenship? How should we respond to the climate crisis, conflict, or inequality? In the face of these daunting global crises, this book encourages reflection on the power of collective action to enhance the dignity and rights of others. Part of a series of books exploring and promoting citizenship in Aotearoa and beyond, Tu Rangaranga joins Tutira Mai (2021) and Turangawaewae (2017, 2022) in combining academic rigour with an examination of how to engage as an active citizen.