Landmark Study Reveals Dutch Royal House Actively Supported and Sustained the Slave Trade

Dutch King Willem-Alexander delivered a speech after receiving the results of an independent study into the role of the House of Orange-Nassau in Dutch colonial history, at Leiden University in Leiden, the Netherlands, on October 2, 2026. A historical study has found that the Dutch royal family benefited from the country's colonial policies in past centuries and helped the slave trade to survive.

The in-depth study, commissioned by King Willem-Alexander and conducted by Leiden University, showed the House of Orange-Nassau actively supported Dutch colonialism for centuries, though it only rarely determined colonial policy, according to the university's statement published on Friday. Dutch historians and human rights experts concluded after a three-year study covering the period from 1600 to the present that the involvement was wholehearted and without real reservations.

The research leaves no doubt that the House of Orange shares responsibility for the survival over the centuries of the Dutch slave trade and slavery, noting that most rulers showed no objections to the practice. King Willem-Alexander stated on Friday that he was personally affected by the explicit conclusions of the research, acknowledging that the effects of colonialism and slavery are still felt today through ongoing discrimination and economic exploitation.

The study also revealed that the royal family profited substantially from the colonial system at times, primarily through trade in the Dutch East Indies, which is modern-day Indonesia. In the 19th century, profits accumulated to about $650m in modern terms, while earnings from the slave trade itself were almost negligible.

The Dutch monarch, who previously apologised in 2023 for his ancestors' lack of action against slavery, highlighted their lack of counter-current leadership during the colonial era. The House of Orange has ruled the Netherlands since the late 16th century, initially as stadtholders and later as a monarchy, overseeing vast territories in Southeast Asia and the Caribbean including Indonesia and Suriname.

These findings could further intensify the ongoing debate regarding reparations in the Netherlands. While the government previously issued apologies and established a social initiatives fund, anti-racism campaigners have argued the measures are insufficient, and organizations like the National Institute for the Dutch Slavery Past and Heritage call for the findings to drive a new phase of national awareness and dialogue.