I dont know why anyone would want a slave even then, it must have been the "in" thing to have I guess.
The problem so many people have with comprehending history, is this inability to understand life in another era of time. For some reason, they assume life has always been the way things are now, and that is simply not the case. I can't imagine why anyone would want a slave now, being that it's racist and morally frowned upon, and a violation of human rights. Even if it were the "in" thing, that seems enough to dissuade most people. Still, there are probably people would LOVE to have a slave, to do all the shit they didn't want to do, like mow the yard or clean the windows. Nowadays, people just have kids.
Here's the thing about slavery... When the colonists came to America, they found vast and fertile lands in the South, where crops grew well in the climate. This was a pretty big deal to Englanders, who basically lived on an island, with a climate not really great for any type of agriculture. One of the most popular crops at the time, was cotton. It was used for so many things worldwide, and it was hard to find in England, it had to be imported from India or China. So the colonists decided to plant cotton, lots and lots of it. Now, even in China and India, the method by which the cotton was picked, was slave labor. British colonies elsewhere, were using slave labor to harvest cotton, sugar cane, all kinds of things. So there wasn't anything considered wrong or unethical about this, it was how things were done back then. More and more colonists were drawn to the South, and the fertile cotton lands, by the lure of money and wealth. Cotton plantations sprang up all over, and soon, cotton became the leading crop produced in the colonies.
When we declared our independence from England, the question of slavery should have been addressed, and it was to a degree. Adams didn't like it, but decided it was "a necessary evil" and so it was permitted to remain. Besides, what were they going to do, eliminate the #1 crop and source of revenue for the new country? Of course, cotton plantations continued to pop up, and soon, we had millions of slaves in the South. Whenever you have millions of disenfranchised enslaved people, you naturally have horror stories of abuse, neglect, and atrocity. This resonated with the peaceful Quaker people in the North, who were appalled by slavery, so they began a movement to have slavery abolished. After decades of protest, they convinced the politicians to do away with slave trading, the capitalist exchange happening in our ports, where ships full of slaves arrived daily. Of course, this simply eliminated any new slaves from coming, but millions were already here. What could be done about that? Well, the abolitionists pushed to have them liberated from slavery, of course, but in a landmark SCOTUS ruling, the slaves were deemed to be "property" by the court, not human beings.
So now, you have the situation where American citizens owned property, deemed so by the court legitimately, and yet the abolitionists were still fighting to liberate the slaves. The Constitution is clear in the 4th Amendment, the government doesn't have the power to seize or confiscate your property without due cause. Yet that was exactly what the abolitionists sought to do. The government was somewhat caught in the middle, they couldn't outright seize property, and most of them were opposed to the idea anyway, because of what it would have done to their cash cow, Cotton. So we plodded along a few more decades, with court battles and challenges, all the while, with the knowledge and understanding the SCOTUS had ruled the slaves were property. Plantation owners had not disobeyed the law, they made honest purchases in good faith, of slave labor to work the fields. No different to them, than buying a mule or horse. The SCOTUS was on their side, they hadn't done anything wrong, so why should they have to suffer the financial loss for their investment?
Okay, so now you see where there was a problem here. The government wanted to do something, so they began a program by which, they would purchase the slaves from the plantation owners, then they would take the slaves away somewhere to live free. You see, that was another problem, what to do with these millions of uneducated slaves? We certainly couldn't just turn them loose and let them fend for themselves. The idea was to liberate them by purchasing them from the plantations, then shipping them away somewhere... out of sight, out of mind. Now, this idea worked on a small scale basis, in fact, they all but eliminated slavery in Maryland. But that was only a few thousand slaves, there were millions of them in the South. So this plan wasn't going to be efficient in the long term, we simply couldn't afford to purchase all the slaves, which were estimated in value at the time of the Civil War, at just over a billion dollars (1860 dollars).
Lincoln had the idea, that we could ban future slavery by only allowing states in the union as "free states" and eventually, there would be enough "free states" to have votes in Congress, whereby, slavery as an institution would surely fall. Of course, the Southern plantation owners could see what was happening, they weren't stupid. They knew that Lincoln was onto something here, and if they didn't do something drastic, slavery was about to be a thing of the past. They would never be compensated for their property, it would simply be outlawed through an influx of "free state" votes to do so. Therefore, they decided that secession from the Union was warranted. Under their own flag and constitution, they could retain slavery and their way of life, and the Union would be free to do whatever the hell they pleased.
People today, often draw the misconception that the Civil War was about slavery, it wasn't. It was OVER slavery, but it was ABOUT federal intervention in the rights of individuals and states. It was about the Union's attempt to subvert their own Constitution and render "property" illegitimate, as well as "property rights." I compare this in analogy today, as the following: What if the government decided to deem your car is not property you own? Of course, you bought and paid for your car, you know that, but if the government says you don't have a right to your car because it's no longer your property, what is your argument against that? You say, well, they can't do that because of the 4th Amendment, but that is exactly what they intended to do. This is why the Southern states seceded. From a purely "constitutional" standpoint, they had every right to do so. Remember, the SCOTUS ruled slaves were "property," not the CSA. The 4th Amendment was part of the US Constitution, not something the CSA made up.
People today will sometimes look at history and say... How could they have enslaved people and not realized this was wrong? Well, because the SCOTUS ruled they weren't "people" but rather, "property," and this was upheld in law, and commonly accepted. Very few people saw African slaves as anything more than livestock, and certainly not citizens with constitutional rights. Even most abolitionists, including Lincoln, didn't view the slave as being equal to whites. We have to remember this context when discussing this part of our history, otherwise, we end up thinking... why would anyone want to own a slave?