Slavery in Mauritania.
Mauritania was the last country in the world to abolish slavery officially (1981). It took even more years to actually criminalise it (2007). Nevertheless, Mauritania experiences a multigenerational cycle of slavery up until today.
Therefore, slaves are still standing on the map of Mauritania in this illustration.
If interested in the issue, check out the link ('Mauritania: Slavery's last stronghold) :