Ten thousand people would need to be freed every day to eliminate modern slavery over the next decade, according to a research.
More than 40 million people have been estimated to be captive in modern slavery.
The worst countries for modern slavery are North Korea, Eritrea, Libya, Iran, Equatorial Guinea, Burundi, Democratic Republic of the Congo, Congo, Russia and Somalia.
Forced labor and forced marriage are not considered as crimes.
Wealthy countries that have taken little action are Qatar, Kuwait, Hong Kong, Russia, Singapore and Brunei.
Sex slavery and trafficking in the Gulf states is rampant.
An estimated 16 million people are trapped in forced labor.
Only 40 countries have investigated the exploitation.
Ukraine, Moldova, Georgia, Nigeria, Ethiopia and Mozambique have taken steps to end modern slavery despite their limited resources, said the report.