The term expatriate comes from the Greek verb diaspeirō, meaning “distributed” or “propagated”. Originally used in ancient Greece, expatriates refer to those who voluntarily migrated from their home country to the dominant country that was conquered by the country. Today, scholars recognize two types of expatriates: forced and voluntary. Forced expatriates often come from traumatic events such as war, imperialist conquest or slavery, or natural disasters such as famine or prolonged drought. As a result, people who force expatriates often share the desire to persecute, lose and return to the motherland. In contrast, voluntary expatriates are a group of people who leave their hometowns to find economic opportunities, just as large-scale immigrants from the poor regions of Europe to the United States in the late 19th century. Unlike the diasporas created by force, voluntary immigrant groups are less likely to wish to return to them permanently while maintaining a close cultural and spiritual connection with their country of origin. Instead, they are proud of their common experiences and feel a certain amount of social and political “quantity.” Today, the needs and demands of a large number of expatriates often influence government policies, from diplomatic and economic development to immigration.