Mike's fairy tale:
Hey man, the south was just minding their own business. Yeah, we know slavery is horrible now but, back then, slaves were just property. Lincoln attacked without even giving negotiation a shot. If he had just waited, the south would have voluntarily given up slaves soon enough. No need to kill 600,000 people.
Reality:
The South relied on millions of slaves. As soon as they thought Lincoln was even considering abolishment, they seceded. They made it clear in their secession declarations that this was not negotiable. Abolishment was a non-starter. Lincoln was going to have take the slaves over the South's dead bodies. So he did. And he was a great president because of it.