 These ideas are complex, and the debate over their relevance to global justice is likely to continue. One immediate worry, of course, is how to understand the relationship between that wealth created by natural resources, and that wealth created by human agency and ingenuity. Steiner and Risse both argue that the collective right to use the earth constrains what distribution of wealth can emerge at the global level; but both must provide some account of how to figure out what counts as given to humans by God or by nature, from that which is created by humans using their brains and their agency. Steiner and Risse do, of course, engage with exactly that issue; but the precise cut between what is made by God and what is made by humanity is likely to be a continuing source of controversy.