There are many causes and effects of illegal immigration. Some of the causes include poverty, political instability, and persecution. These factors can lead people to leave their home countries in search of a better life elsewhere. Once they arrive in their destination country, they may find themselves undocumented and subject to deportation. The effects of illegal immigration can be both positive and negative. On the positive side, undocumented immigrants can provide a source of cheap labor. They may also help to diversify the cultural makeup of a country. On the negative side, undocumented immigrants may be exploited by their employers and paid below minimum wage. They may also be living in fear of being deported.