Illegal immigration is a major problem facing most developed countries in today's economy. This is a major political issue for the political parties (Republicans and Democrats in America) and over the years, each party has adopted a different agenda to address this problem. Illegal immigration can be defined as the movement of people from a country of origin to a country of destination without any legal documentation and violates the immigration laws of the country of destination. People have moved from one country to another over the years to escape a war situation or to get better facilities in different countries. Countries have set immigration laws to prevent people from entering their territory without proper documentation, as the social and time constraints problems linked to illegal immigration affect areas such as social protection, healthcare health, voting rights, the economy and human rights. A person may be classified as an illegal immigrant in a country if he or she is not a national of a country of residence and entered the country without any legal documents or resides with expired documents. Illegal immigration can occur for a variety of reasons, but one of the main causes is The years were marked by civil wars that pushed people across the borders of other countries. Another factor may be poverty, where people migrate legally or illegally from other countries for better paying jobs and better living conditions. One of the main examples of this is the thousands of people who apply for H1-B (highly skilled workers) every year to legally. work for a company in America. Another factor could be persecution in their own country for wrongdoing in religious or political beliefs and fleeing to a neighboring country for refuge. According to Anderson, immigrants come to America from neighboring countries, especially Mexico, to benefit from paper fees and facilities that are much better than those in their own country. Works Cited • Anderson, Oliver C: Illegal Immigration: Causes, Methods and Effects. New York: Nova Science Publishers. 2010. E-book. , Database: Electronic Book Collection (EBSCOhost).• Chong K. Yip and Palivos, Theodore. Illegal immigration in a heterogeneous labor market. Journal of Economics 101.1 (2010): 21-47. Print.• Gerking, Shelby and John H Mutti. Costs and benefits of illegal immigration: key questions for government policy. 61.1 (June 1980): 71-85. Print.• Haines, David W and Rosenblum, Karen E.: Illegal Immigration in America: A Reference Handbook. Westport, CT: Greenwood Press. 1999. Electronic book. , Database: Electronic Book Collection (EBSCOhost).• Nadadur, Ramanujan. “Illegal Immigration: A Positive Economic Contribution to the United States.” Journal of Ethnic and Migration Studies 35.6 (2009): 1037-052. Print.