The source of 27 million slaves today is outdated. More importantly, the source paper referenced by the BBC here doesn't show any source for such a number, the closest it comes is to reference two specific examples of slavery, Sudanese slaves captured by paramilitary or government forces and sex slaves in Mumbai. Both examples are listed with estimates topping 90,000 enslaved.

In no way am I saying slavery is no longer a problem, one slave is too many. I chose not to go after the parent comment's claim that slavery has ended because that wasn't the important to the point I was raising.