Slavery

Slave Trade is a trade practice involving slavery along with it being adopted by different nations throughout the New World.

The Undead King Arc
It was noted that a few years ago, the Re-Estize Kingdom still sanctioned the slave trade.Overlord Volume 01 Chapter 4: Duel

The Bloody Valkyrie Arc
It was known that the sister of Zach had been apparently sold off to slavery for unknown reasons he does not know why. To this very day, slavery was outlawed thanks to the efforts of Princess Renner. Prior to that ever happening, slave trade had been quite widespread throughout the Re-Estize Kingdom.Overlord Volume 03 Chapter 1: Herd of Predators

The Men in the Kingdom Arc
and The Men in the Kingdom II Arc It was mention that the criminal organization, Eight Fingers was divided into eight divisions and among one of them, was said to be responsible for the slave trade continuing secretly in the Re-Estize Kingdom.Overlord Volume 05 Chapter 1: A Young Man's Heart

Climb recall that Princess Renner had solve the slave problem while putting the common people first, but the nobles frequently obstructed her legislation and prevented most of her policies from being implemented.

In the past, when slavery had not yet been criminalized, there were quite a few such brothels still operating. However, due to the work of Renner, the slave trade was now classified as illegal, and those establishments fall apart. The adventurer group, Blue Roses and Renner were investigating the location of the last illegal brothel hidden in the Re-Estize Kingdom and shut it down. They expect it will not easily shut down with resistance from those maintaining it which is the Eight Fingers.

According to Lakyrus, Tina’s investigations have uncovered several leaders involved in the slave trades. In particular, the nobles who shared a connection to Cocco Doll. However, we haven’t verified their guilt yet, so it’s too early to take action right now.

Meanwhile, Evileye discusses with Gagaran that there are demi-human nations who form trade relations with one another through the use of humans as slaves as their bargaining chip to offer on the negotiating table.

Hilma Cygnaeus recognized the fact that the slave division led by Cocco Doll is declining each passing day. The cause behind that decline was due to the handiwork of Princess Renner who had made slavery illegal in the country. As a result, he had no other choice but to conduct his business underground in secrecy for the sake of continuing the slave trade.Overlord Volume 05 Chapter 2: Blue Roses

When learning of Sebas's predicament with Tuare, Climb mentions that loopholes like people being forced to work in poor conditions as slaves in order to pay off their debts have not gone away despite Renner's antislavery laws have been passed to stop that from happening.Overlord Volume 05 Chapter 4: Congregated Man

Climb later took Cocco Doll in custody as he was caught and arrested for his crime of conducting illegal slave trade.Overlord Volume 05 Chapter 5: Extinguished, Sword Sparks of Fire

Trivia

 * Nobles from the Re-Estize Kingdom are in cahoots secretly with the slave traders from the Eight Fingers.
 * In contrast to the New World, corporations from the World of 2138 treat the poor people that work for them as slaves like Herohero to serve the interest of the rich.