Answer:
The accomplishments of the Lewis and Clark Expedition were extensive. It altered the imperial struggle for the control of North America, particularity in the Pacific Northwest. It strengthened the U.S. claim to the areas now known as the states of Oregon and Washington.
Explanation:
Encounters between European navigators, explorers, conquerors, colonizers, merchants, missionaries and "other" peoples and cultures over the course of 4 centuries. At an immediate and practical level, conquest, colonization and trade led to modes of domination or coexistence and multi-faceted transcultural relationships. In Europe, such encounters with "otherness" led to attempts to explain and interpret the origins and nature of racial and cultural (linguistic, religious and social) diversity. At the same time, observation of alien societies, cultures and religious practices broadened the debate on human social forms, leading to a critical reappraisal of European Christian civilization.
Immigration is the international movement of people into a destination country of which they are not natives or where they do not possess citizenship in order to settle or reside there, especially as permanent residents or naturalized citizens, or to take up employment as a migrant worker or temporarily as a foreign worker.[1][2][3]
As for economic effects, research suggests that migration is beneficial both to the receiving and sending countries.[4][5] Research, with few exceptions, finds that immigration on average has positive economic effects on the native population, but is mixed as to whether low-skilled immigration adversely affects low-skilled natives.[6][7][8][9][10] Studies show that the elimination of barriers to migration would have profound effects on world GDP, with estimates of gains ranging between 67 and 147 percent.[11][12][13] Development economists argue that reducing barriers to labor mobility between developing countries and developed countries would be one of the most efficient tools of poverty reduction
