미국 인구 중심의 이동

Changing Center of Population. 

Data from: United States Census Bureau, Statistical Abstract, 2011.

Human Geography (10th) by H.J.de Blij (Wiley) - 99page

National migration flows can also be thought of as internal migration flows. 

Historically, two of the major migration flows before 1950 occurred internally,
that is, within a single country rather than across international borders. 

In the United States, a massive migration stream carried the center of population west
and more recently also south, as Figure 3.16 shows. 

(전체적으로 보면, 위 그림에서 초기에는 서쪽으로만 움직이다가
후반에는 서남쪽으로 약간 방향을 튼 것을 확인할 수있습니다)

As the American populace migrates westward, 

it is also shifting from north to south, to reflect migration flows from south to north and back again. 

After the American Civil War, and gaining momentum during World War I,
millions of African Americans migrated north to work in the industrial Northeast and Midwest. 

(세계 1차 대전 기간 중에는 아주 미약하나마 북쪽으로 올라가는 모습도 볼 수 있습니다.
흑인들이 일자리를 찾아 북으로 올라왔기 때문일 것입니다)

This internal migration flow continued during the 1920s,
declined during the depression years of the 1930s,
and then resumed its upward climb. 

In the 1970s, the trend began to reverse itself
: African Americans began leaving the North and returning to the South. 

The reversal had several causes.

Although the civil rights movement in the 1960s did not change conditions in the South overnight,
it undoubtedly played a role in the reverse migration. 

Disillusionment with deteriorating living conditions in the Rustbelt of the urban North and West,
coupled with growing economic opportunities in Southern cities,
also drew African Americans southward. 

African Americans who lived in Northern cities migrated to Southern cities,
not to rural areas, as the urban economies of the Sunbelt began to grow.