Although immigration is not a new phenomenon in the history of the world, it has been noticed that nowadays immigration has increased more than ever. This is mainly due to improved modes of communication and transportation, which allow people to travel and enter other countries. However there are many types of immigration such as economic immigrants, retired immigrants or even "natural disaster" immigrants. People sometimes look for a new life to save themselves from poverty and misery, so they decide to enjoy the benefits of another country. There are still other immigrants who are forced to leave their countries due to wars or even natural disasters, such as the tsunami in Japan in 2011. Some philosophers believe that closed borders limit people's freedom of movement and that global justice has been violated. On the other hand, Miller and other philosophers argued that immigration causes more disadvantages than advantages in the country they enter. They also agree that states have the moral right to restrict immigration to prevent any change in their culture, since immigration affects several aspects, even if it means they will violate human rights. Another concern for states is the welfare state, which can sometimes be limited and countries cannot afford any immigrants. However, is it right to oppose people's freedom rights, or is it right for states to limit immigration? First, to justify why countries limit their immigration, one should know the different types of immigrants since there are different reasons for leaving from one country to another. country and move to another. Over the past 30 years, the number of international immigrants has been estimated at 191 million worldwide, double the number before. How... half the paper... orders", Review of Politics 49 vol.2,• Wilcox S., 2009, "The Open Borders Debate over Immigration", Philosophy Compass 4• Fairchild HP, 1930, 'L 'immigration and the population problem', Annals of the American Academy of Political and Social Sciences, New York University• McLauhin A.., 1905, 'The immigration problem', The Popular Science Monthly, US Public Health and Marine Hospital Service Washington DC• Walter E., 2010, 'The Many Effects of Effective Immigration Reform', vol.47, Society• Smith T., 2006, The Root Causes of Immigration, Justice for immigration: a journey of hope, Kentucky Catholic Conference • Joppke C., 1999, "Immigration and the nation-state: United States, Germany and Great Britain", Oxford University Press • Lemay CM and Barkan RE, 1999, “United States Immigration and Naturalization Laws and Issues,” Greenwood Publishing Group