Today's economies fail to recognise that we are in a rapidly worsening crisis, reproducing and often worsening vast and harmful inequalities between people and countries. The current models are unsustainable, and at a time when global temperatures are rising and divides are deepening, humanity is left in a rapidly worsening situation of its own making, the destruction of the living world, which will make large parts of the earth uninhabitable. Without access to the knowledge, skills or tools to build a better future, local, national and global economies will continue to fail to address the interlinked challenges of systemic racism, inequalities faced by women, the Covid-19 pandemic and the nature and climate emergency. Across the world, economics students are coming together under the banner of the student movement, Rethinking Economics, to create a better economics - one which can help to create a world where all our children can flourish regardless of their gender, background or birthplace. Drawing on over sixty interviews with students and professionals from identities and backgrounds marginalised in economics and a wide range of global and historical research, this book illustrates the ways in which the discipline is currently not fit for purpose and sets out a vision for how it can be diversified, decolonised and democratised. The struggle to reclaim economics could not be more crucial - our futures depend on it. This book explains how it can be done.