It was overwhelmingly Christians two centuries ago who worked to abolish slavery around the world. Because of the tireless efforts of abolitionists like William Wilberforce, most of the world no longer has to deal with this horrific sin against humanity. However, there are still at least two forms of slavery being practised. Tragically, slavery in parts of the developing world is still very common. But even in the West, there is another sort of slavery which is occurring as we speak. I refer to…