According to the International Labour Organisation (ILO) 20.9 million men, women and children around the world are in slavery.
The most common forms of slavery according to the ILO are:
- Child Slavery affects an estimated 5.5 million children around the world.
- Early and forced marriage predominately affects women and girls who are married without choice, forced into lives of servitude often accompanied by physical violence and have no realistic choice of leaving the marriage.
- Forced labour affects people who are illegally recruited by individuals, businesses or governments and forced to work - usually under the threat of violence or other penalties.
- Descent-based slavery involves people who are either born into a 'slave' class or are from a 'group' that society views can be used for slave labour.
- Trafficking involves the transport of any person from one area to another for the purpose of forcing them into slavery conditions.
More top news
The 100 leaders did not agree on concrete proposals, but the meeting has raised hopes for concrete international agreement next December.
The speech was OK, passionate at times and certainly well received, but did not display the passion of past speeches.
The brother-in-law of a British hostage being held by Islamic State militants in Syria, says he is scared by US airstrikes in the country.