Many nation states have agreed and disagreed on the topic of open borders and free migration , with some countries allowing people to travel freely from country to country and state to state without the risk of deportation or punishment . The consensus within the open borders debate is to “ establish a view of migration that reflects the liberal commitment to the equal moral worth of all people which applies to a truly global view of migration . ” Various ideas have been applied to a global view of migration , such as the ideas of other journalists such as Johnathan Wolff and Avnir De-Shalit to migration . Wolff and De-Shalit ’s state that the use of law and ethics is a positive factor in the debate over free migration . The debate of free migration does not apply to a specific country but extends beyond , and continues on to a broader spectrum for introducing a freedom of movement amongst all people , for all countries . However , this concept is especially significant to the places that experience the most migration-including both host and receiving countries or states . Free migration is not limited to a certain time period , but has been more relevant and controversial in recent years , especially in the United States . In the U.S. , it has become a more controversial topic since 9/11
9/11
September 11 attacks
Free migration