It has been argued that, without having to have fought a bloody, Civil War, the United States as a nation could never have achieved westward expansion so quickly and successfully, Discuss

Indicate whether you agree or disagree with the statement, above, and give your reasons (referencing the aftermath of the Civil War, Reconstruction, the growth of Industry, and other social, political and e economic factors), and taking into account the growth of railroads, improvements in infrastructure, political, social and economic reform movements.

No references nor citations are necessary, just your well-reasoned arguments.