Global justice is a relatively new topic in the history of political philosophy. A little over a decade ago, when I started working on problems of global justice, there were very few books available in this field, written by only a handful of theorists who were interested in this then marginal topic. Most works written on justice in political philosophy focused on domestic issues, namely how the state should treat its citizens. Recently, however, there has been an explosion of interest in questions related to global justice, with an increase in the number of scholarly works to match. This attention is fully justified, given the extreme level of global poverty and the vast inequalities between peoples living in the most affluent and in the poorest countries. We must ask what the responsibilities of wealthier societies are. Do they have any duty of justice to contribute to eradicating global poverty and reducing inequalities? If they do, what are its grounds? Can we apply globally the principles of justice we accept for the domestic domain? I seek to approach and answer these questions by discussing whether there are obligations of distributive justice that apply at the global level.