What changes in population and culture were brought about by migrations?

Populace expanded and societies were spread through migration. 
The Impact of Migration on Population Change. Figure 1 presents one view demonstrating the size of net movement by the district in the 1990s. In Elkhart County, an expansive stream of Hispanic transients represented a great part of the populace development throughout the decade. 
People who migrate encounter numerous burdens that can affect their mental prosperity, including the loss of social standards, religious traditions, and social emotionally supportive networks, acclimation to another culture and changes in character and idea of self.

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“destroyers for bases agreement in the destroyers for bases agreement between the united states and the united kingdom on september 2, 1940, fifty caldwell , wickes, and clemson class us navy destroyers were transferred to the toyalbnavy from the united states navy in exchange for land rights on british possessions.” i hope this you .