Globally, more than 40 million people are still victims of contemporary slavery, including about 25 million in forced labour and about 15 million in forced marriage, according to UN estimates.
One in four victims are children, and women and girls account for 71 per cent of the victims, according to the report.
The International Day for the Abolition of Slavery, commemorated each year on 2 December, marks the date of the adoption of the UN Convention for the Suppression of the Traffic in Persons and of the Exploitation of the Prostitution of Others.
Commemorating the day the United Nations Secretary-General on Wednesday underscored that contemporary forms of slavery have no space in the twenty-first century in the world, reports UN News.
In a message, the UN chief highlighted the impact of the contemporary forms of slavery.
Secretary-General António Guterres said that global protests this year against systemic racism brought renewed attention to a "legacy of injustices all over the world whose roots lie in the dark history of colonialism and slavery."
"But slavery is not simply a matter of history."
"Poor and marginalized groups, in particular racial and ethnic minorities, indigenous peoples and migrants, are disproportionally affected by contemporary forms of slavery," Guterres said.
"Gender inequality further reinforces patterns of discrimination," he added.
Slavery manifests itself through descent-based servitude, forced labour, child labour, domestic servitude, forced marriage, debt bondage, trafficking in persons for the purpose of exploitation, including sexual exploitation, and the forced recruitment of children in armed conflict.
The UN chief urged all sections of the society to strengthen their collective efforts to end the abhorrent practices.
"I call for support to identify, protect and empower victims and survivors, including by contributing to the UN Voluntary Trust Fund on Contemporary Forms of Slavery," he added.
In the message, the Secretary-General also recalled the Durban Declaration and Programme of Action, a comprehensive, action-oriented document that proposes concrete measures to combat racism, racial discrimination, xenophobia and related intolerance. It also acknowledges that slavery and the slave trade are crimes against humanity, and should have always been so.
"This milestone document defines slavery and slavery-like practices as flagrant violations of human rights … we cannot accept these violations in the twenty-first century," Guterres stressed.