LEIDEN,  (Reuters) – The Dutch ​royal house benefited from the Netherlands’ colonial policies in past centuries and helped the Dutch slave ‌trade to survive, an in-depth historical study commissioned by King Willem-Alexander showed on Friday.

“The involvement of the House of Orange-Nassau was wholehearted and without any real reservations,” researchers concluded after a three-year study carried out by Dutch historians and human rights experts looking at the period from ​1600 to the present.

“The research leaves us in no doubt that the House of Orange shares responsibility for ​the survival over the centuries of the Dutch slave trade and slavery,” the study said, ⁠pointing out that most of the rulers showed no objections to slavery.

The House of Orange has ruled the Netherlands since ​the late 16th century, first as so-called “stadtholders” who presided over the republic, and later as the royal house when the ​Netherlands became a monarchy.

For most of this time, the Dutch ruled over vast colonies in Southeast Asia and the Caribbean, including what is now Indonesia and Suriname.

“We know the effects of colonialism and slavery are still being felt today. Discrimination and economic exploitation unfortunately happen every ​day,” King Willem-Alexander said in a speech at the presentation of the research.

APOLOGIES BUT NO REPARATIONS

The findings could stir up ​the debate around reparations in the Netherlands. In 2022 the Dutch government acknowledged the Dutch state bore responsibility for transatlantic slavery, and apologised. King Willem-Alexander ‌apologised ⁠for slavery in 2023.

The government at the time ruled out reparations, instead creating a €200 million ($238 million) fund for social initiatives, which anti-racism campaigners have dismissed as insufficient.

The National Institute for the Dutch Slavery Past and Heritage (NiNsee) lauded the king for commissioning the study, but said it should lead to a next phase.

“Research impacts society when the new insights into the past contribute ​to awareness, dialogue, corrections and additions ​to our national history ⁠in the school curriculum and the conversation about responsibility and reparatory justice,” NiNsee director Bianca Groen Gallant said.

FINANCIAL GAINS

The Dutch played a major role in the global slave trade from ​the 17th century until the Netherlands abolished slavery in the second half of the 19th ​century.

The Dutch West ⁠India Company operated ships estimated to have trafficked some 600,000 people into slavery, according to Dutch state data.

Enslaved people were violently forced to work under harsh and dehumanising conditions on plantations in Dutch overseas colonies.

The study showed that the royal family at ⁠times profited ​substantially from the colonial system, mostly from the trade in the Dutch ​East Indies, modern-day Indonesia.

In the 19th century for instance, profits accumulated to around $650 million in modern terms, the researchers said.

On the other hand, the family ​earned “almost nothing” from the slave trade, the research showed.