The term immigration was coined in the 17th century, referring to non-warlike population movements between the emerging nation states.
When people cross national bordersduring their migration, they are

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As of 2015 , the number of international migrants has reached 244 million worldwide, which reflects a 41% increase since 2000. One third of the world's international migrants are

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One theory of immigration distinguishes between push and pull factors, referring to the economic, political, and social influences by which people migrate from or to specific countries.

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Treatment of migrants in host countries, both by governments, employers, and original population, is a topic of continual debate and criticism, and the violation of migrant human rights is

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A survey of leading economists shows a consensus behind the view that high-skilled immigration makes the average American better off. A survey of the same economists also shows

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A 2015 study finds "some evidence that larger immigrant population shares (or inflows) yield positive impacts on institutional quality. At a minimum, our results indicate that no negative impact on economic freedom is associated with more immigration."

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The term economic migrant refers to someone who has travelled from one region to another region for the purposes of seeking employment and an improvement in quality of life and access to resources. An economic migrant is distinct from someone

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