The secession produced no negative circumstances until Lincoln’s call for troops and the ensuing invasion.
Your point about ‘nothing allowing...’ is moot.
Nah, just wholesale theft of federal property and repudiation of responsibility for debt and national obligations, not mentioning the ability to cut off the central part of the country from access to the sea via the Mississippi any time the Davis regime felt like it. Nope, no negative impact in that at all, is there? </sarcasm>
And if the war had a negative impact on the South, well then the confederacy shouldn't have started it, should they?