  As the preceding discussion shows, there are a variety of promising arguments in favor of a state’s right to control immigration and many strong considerations which suggest that countries are obligated to maintain open borders. While some arguments are more popular than others, critical questions can be raised about each of them.  Rather than try to decisively defend either side here, let us conclude by briefly surveying some of the more engaging applied issues related to the morality of immigration. These include the definition and moral claims of refugees, the conditions under which one may hire guest workers, the permissibility of recruiting skilled professionals from poor countries where individuals with these talents are already in short supply, the rights of irregular migrants, and what kinds of selection criteria a country may use to distinguish among applicants for immigration