In Two Billion Caliphs, Haroon Moghul offers a uniquely Muslim perspective on what it means to be in the world. Drawing from his faith, he presents surprising, moving, and bracingly honest perspectives on the big questions many of us struggle with daily: Who am I? What am I doing here? What happens to me after I die? But Moghul does so much more than tell us what Muslims believe. He speaks to Islam’s possible tomorrows, aspiring to something much more audacious–and urgent.

The future of the world is inseparable from the future of its fastest-growing faith. But what kind of future should that be? Moghul wrestles with pluralism, secularism, and democracy. He wonders what his religion has to say about changing understandings of gender, sexuality, and identity. He considers the alleged incompatibility of science, reason, and theology. He even dusts off concepts like the Caliphate, asking what an immensely diverse global community badly traumatized by theocracy should do with it.

Two Billion Caliphs will inspire Muslims to revive the generosity and intimacy of their beliefs. But it is a call to all people–not just to face what comes next, but to be a part of shaping it, too.