Historically, immigration has taken place in continents like Africa. Where many Africans spread to Eurasian countries. The earliest fossils of recognizable Homo sapiens were found in Ethiopia and are approximately 200,000 years old. Immigration continues to happen in many parts of the world for purposes like education, cultural exchanges, others seek business growth and migrate to a foreign country with the intent of making money. People immigrate in search of a new lifestyle, a new experience and an exposure to everything that lies beyond their nation's boundary. Immigrants also are known as expatriates or transnational communities play an important role in leveraging benefits for the development of migration. As per the World Migration Report, the number of international migrants is estimated to be almost 272 million globally.
At times, immigration becomes a person's need. In case of personal reasons such as shifting a person's family, in case of a marriage with someone staying abroad and in case of family needs to move to another nation, a person is forced to move out of the country. The immigration laws that facilitate the migration of people between the two countries are of great help in such cases.
Immigration today also happens due to reasons like war and conflict in a country. For instance, conflict in countries like Syria, Yemen, the Central African Republic, the Democratic Republic of the Congo and South Sudan led people to immigrate and seek safety in different countries. It is often believed that undocumented immigrants do not contribute to society in any way. The fact is that even undocumented immigrants pay state and local taxes. For example, it is estimated that all immigrants in the United States —regardless of status—will contribute approximately $80,000 more in taxes than government services used over their lifetime.
As per reports by the United Nations, the United States has the highest number of immigrants with 48 million in 2015, five times more than in Saudi Arabia and six times more than in Canada. However, in proportion to their population size, these two countries have significantly more immigrants: 34% and 21%, respectively, versus 15% in the United States.
Immigration also proves beneficial. For example, in the United States, immigrants have been founders of companies such as Google, Intel, PayPal, eBay, and Yahoo!. Even in Silicon Valley, many start-ups are established by immigrants. Moreover, there have been three times as many immigrant Nobel Laureates, National Academy of Science members, and Academy Award film directors than the immigrant share of the population would predict.
