There is not a single instance where slavery was not ended through government legislation, and always over the strenuous objection of the slave owners themselves. Since the southern states were willing to rebel to protect slavery in 1860 how long do you think it would be before they would be willing to sit back and accept a forced end to their institution? 20 years? 50 years?
I wrote that nowhere except Haiti and the US did war accompany emancipation, and you write about government legislation as if that addressed the point. No wonder you chose the name "non-sequitur" ("it does not follow").