By 1860 the North had almost completely ended slavery, as has been documented repeatedly for you on this thread. The South still had most of their culture and economy built on it. So much so that they were willing to go to the extreme of secession and war to protect it, whether it was in fact truly threatened or not.
But you tell me, was the institution of slavery wrong or not?
Virginians like George Washington, and Thomas Jefferson, And George Mason, and Patrick Henry said it was.
Jefferson engineered the Northwest Ordinance, pushing the transfer of that vast territory from Virginia to the general government, SLAVE-FREE, in perpetuity. The Virginia legislature signed off on it. Were they all wrong?
“But you tell me, was the institution of slavery wrong or not?”
Not to put too fine a point on this, but — are you asking me if slavery was wrong before the northern states tired of it, or afterwards?