 This argument has an ancient pedigree (depending on how one interprets Plato [Crito]), and it boasts certain theoretical advantages over other derivations of political obligation. It explains, for instance, why subjects have obligations to their own particular state, rather than, say, to every state that is just or legitimate. It also does a better job than other theories of political obligation at explaining why refugees seem to have prima facie obligations to obey the laws of their host countries, at least when those refugees are treated generously, fairly and respectfully (D’Cruz 2014). The argument from gratitude for political obligation has also been the target of many objections.