Should be noted that the immigrant ships also had a high death rate, quite possibly as high or even higher than those on the slave ships.
The slaver captains, after all, had a financial incentive to keep slave alive. The immigrant ship operators didn't have an incentive to minimize deaths. The "coffin ships" of the Potato Famine often had death rates over 30%.
Good point, and I didn’t know that little factoid.
It doesn’t even require any particular malice or neglect or extra care on the parts of the respective captains. The slavers started with cargoes of healthy able-bodied young men and women; the coffin ships, the very young, the elderly, the sickly and half-starved refugees yearning to breathe free.
Back in the 1970s when I first started working, I flew everywhere. Back then, even coach wasn't bad. Today, I'm retired on a fixed income, so I can't afford to travel like I used to. But even if I could afford it, I'm reluctant to fly. Just so not worth it.
Actually, to veer from the subject of this thread for a bit, slavers only needed about 25% of their cargo to survive to pay for the trip and turn a profit. This gave birth to a controversial theory; that black Americans excelled at sports because only the physically strongest of them survived to pass on their genes.