Final answer:
The refocusing away from the South's problems post-Civil War resulted from economic shifts towards industrialization, political protectionist policies, and changes in the social and cultural landscape influenced by post-WWII and Cold War era dynamics.
Step-by-step explanation:
The refocusing of the nation away from the problems of the South after the Civil War can be attributed to several key factors. Firstly, economic shifts played a significant role as industrial prosperity in the North and the need to foster a diversified economy away from the reliance on cotton and plantation economies in the South gained focus. This economic redirection was part of the 'New South' movement which advocated for industrial growth and family farms over the old plantation system.
Politically, the nation's focus also gravitated away from southern issues due to sectional tensions and protectionist policies, such as the increase in tariffs, which were seen by the North as a countermeasure against economic downturns and by the South as a federal imposition that negated their interests.
The social and cultural landscape, too, shifted significantly due to America's changing role in the world, most notably post-World War II and during the Cold War era. The Southern Literary Renaissance, the Sunbelt's population growth, and the emergence of the evangelical movement in politics further tilted the national focus towards broader issues that spanned beyond the South's reconstruction.