Belgium should be held accountable for the current state of the Congo and be forced to pay back Leopold II's gains from it

Between 1885- 1908, King Leopold II of Belgium murdered between 10 million and 15 million Congolese.
He assigned rubber quotas to villages and would retaliate by mutilation (forced amputation of hands and feet) if the individuals (men, women, children) in the village did not meet said quotas.
In all, the Belgian Nation received property worth more than £2,400,000 from the Congo.
Although Leopold claimed never to have profited personally from the
Congo, a secret trust set up in Germany was subsequently discovered –
with £1.8 million of Congo profits on deposit

http://www.britishmuseum.org/pdf/congofreestate_studentsworksheets.pdf
Adam Hohschild- King Leopold's Ghost (book)