It would be important because then you would rule all of that area
<span>A society (or country) might decide to produce candy or cars, computers or combat boots. The goods might be produced by unskilled workers in privately owned factories or by technical experts in government-funded laboratories. Once they are made, the goods might be given out for free to the poor or sold at high prices that only the rich can afford. The possibilities are endless.</span>
The difference lies in interpreting the two sides of the conflict. McPherson saw the war as the war between the evil South and the good North. He was focused on the abolition of slavery and their integration into the society as free people. Horwitz on the other hand saw South not as evil but as a faction which went to war to protect its economic interests.