That is a nice way of saying, "more than half."
6/11 is 54.5 which is more than half. If you get "only 6 out of 11 votes" from a panel of judges, you are likely the winner.
More than half of participants citing one cause as the *primary reason* is fairly significant.
Confederate Vice President Alexander Stephens said slavery was the primary cause of the secession crisis and that the foundation of the Confederacy was slavery.
In his March 21, 1861, Cornerstone Speech, Confederate Vice President Alexander H. Stephens presents what he believes are the reasons for what he termed was...
www.battlefields.org
Savannah, Georgia, March 21, 1861
By Alexander H. Stephens
But not to be tedious in enumerating the numerous changes for the better, allow me to allude to one other though last, not least. The new constitution has put at rest, forever, all the agitating questions relating to our peculiar institution African slavery as it exists amongst us the proper status of the negro in our form of civilization. This was the immediate cause of the late rupture and present revolution. Jefferson in his forecast, had anticipated this, as the "rock upon which the old Union would split." He was right. What was conjecture with him, is now a realized fact...
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Our new government is founded upon exactly the opposite idea; its foundations are laid, its corner-stone rests, upon the great truth that the negro is not equal to the white man; that slavery subordination to the superior race is his natural and normal condition. This, our new government, is the first, in the history of the world, based upon this great physical, philosophical, and moral truth. This truth has been slow in the process of its development, like all other truths in the various departments of science.
The Confederate Constitution was an almost word for word mirror of the United States Constitution, except in regards to provisions for slavery.
There is no reasonable doubt that the Confederacy came into existence to preserve and consolidate the institution of slavery, that slavery was the primary reason for a majority of secession by the states that became members of the Confederacy, and that for the remaining states, slavery was either the number two or number three reason for their secession.
The Confederacy was not a *society with slavery*, it was a slave society; not Republic with slavery, but rather a slave Republic. That many Southerners persist in insisting otherwise is indicative of either their ignorance in their own history, the statements of their own leaders, and their own founding documents, or the existence of an agenda and an ulterior motive.