Not a single nation, over dozens, ever warred over abolition or slavery. States rights were the issue. And currency, which got Lincoln assassinated. Reply
Actually, primary motivator for Roman Wars was the accrual of slaves for markets. Muslim Empires were same. Slavery might not have been the only motivator, but it was ONE of them. Twas a right strong one as well. However, all wars boil down to economics. No Nation goes to war without an eye towards booty. Not even the good ol’ US of A. Reply
Thai Chilis and Blue Grass 
Not a single nation, over dozens, ever warred over abolition or slavery.
States rights were the issue. And currency, which got Lincoln assassinated.
Actually, primary motivator for Roman Wars was the accrual of slaves for markets. Muslim Empires were same.
Slavery might not have been the only motivator, but it was ONE of them. Twas a right strong one as well.
However, all wars boil down to economics. No Nation goes to war without an eye towards booty. Not even the good ol’ US of A.