This paper considers the effectiveness and efficiency of global growth, as a route to poverty reduction, since 1990 and then demonstrates the redistributive challenges implicit in various poverty lines and scenarios: the significance being that this historical data can inform understanding and appreciation of what it would involve to end global poverty in the future. We find that a very modest redistribution of global growth could have ended poverty already at the lowest poverty lines. However, higher, but arguably more reasonable, poverty lines present radically different challenges to the current workings of national economic systems and to global (normative) obligations.