AHH I just wrote a huge response and the deleted it somehow on accident!!!
To say that the reason the south lost was because of the economy is bull, that is waht ignorant teachers tell their students, it isn't an agrument. Granted it didn't help having a poor economy, but it was largely cause by military failures.
Well I'll just a say a few things then, the CSA could have won, and came close. Read these: Lee Considered, Grant and Lee a Study in Generalship and Personality by JFC Fuller, The South Was Right!, The Generalship of Ulysses S. Grant by JFC Fuller. JFC Fuller was a english general and a historian, one of the first generals to understand modern tank warfare.
A couple more things, Lee should have stayed on the defensive, he had little understanding of grand strategy, should have sent aid to Vicksburg (the real turning point) instead of attacking(Gettysburg). When Vicksburg fell, to grant, the CSA was divided and lost control of the missippi, and lost 30,000 soldiers and supplies etc. And what would he have done if he won at Gettysburg? He couldn't seige washington, he didn't hjave the supplies or seige train. The Union could take the losses better than the south could. The CSA was invaded and was defending themselves and they should have stayed and defended, that would have given a better chance of aid, victory and wearing down the Union.
The CSA definately did not win, just look at our government, very strong federal government and weak state governments, people now identify themselves with their country rather then their state. The War of Secession made what is our country today.
I could go into greater depth, I actually wrote a 27 page paper on Grant and Lee for my Honors History class a couple years ago in high school.
Also, the war came close at the end to the south resorting to pure guerilla warfare, Fitz Lee wanted to with his cav and did for a little while but was convinced otherwise, if that happened the war would have dragged on for years more and the the country would be a wreck.
The south could have lost every battle and won the war, just look at the Rev. war, the US lost most of the battles and won, and especially if they kept the invasion at bay.