The South was more or less forced to industrialize after the burning of their main crops and loss of so many men.
The Republican party began as a coalition of anti-slavery "Conscience Whigs<span>" and </span>Free Soil Democrats<span> opposed to the </span>Kansas–Nebraska Act<span>, submitted to Congress by </span>Stephen Douglas<span> in January 1854.</span>
James Otis
The phrase had been used for more than a generation in Ireland. By 1765, the term was in use in Boston, and local politician James Otis was most famously associated with the phrase, "taxation without representation is tyranny."
The second significant cause of the Great Migration was the desire of black Southerners to escape segregation, known euphemistically as Jim Crow. Rural African American Southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the North.Jul 2, 2016
Some might say FDR, some might say LBJ, others might say Nixon. The reality is that the power of the Legislative vis a vis the Executive is in constant flux.
In terms of sweeping policy initiatives FDR's administration might be the time when the Presidency took on many of its contemporary roles. The activism of the LBJ administration was a further expansion of the New Deal-era role of the FDR administration. LBJ also was arguably the first president to use the US armed forces in foreign engagements without Congress declaring war (Gulf of Tonkin resolution)--a precedent we have become all too familiar with. In terms of 'imperial pretensions' Nixon assumed all the New Deal, Great Society, civil rights activism, and the ability to intervene militarily of the preceding Presidencies and expanded them to include unfettered use of the CIA and FBI.