With fewer slaves in the world today than there have ever been, it would cost just £650 a head to usher it into extinction – so why hasn’t that happened?
How much will it cost to end slavery? About £26.7bn, the cost of five and a half aircraft carriers or the current market value of Snapchat. That works out to about £650 for every enslaved person.
In poor countries, where most slaves live, the cost of liberation and reintegration can be lower than this; in rich countries, it can be much higher. Unfortunately, in 2014 the world’s governments were spending about £95m a year on anti-slavery. That is likely to be higher today, but still far below what is needed to achieve change. If we are serious about slavery we will need to bring three key tools to the job: money, people, and knowledge.