Is that raw numbers or as a percentage of the population? He never answers this question. In terms of raw numbers, if the percentage stayed constant, you woul

Is that raw numbers or as a percentage of the population? He never answers this question. In terms of raw numbers, if the percentage stayed constant, you would expect to see a higher total number of slaves because the world population is constantly growing. He also uses a much looser definition of slavery, including those who work for "no pay beyond subsistence". People falling into this category surely existed throughout history, along with the more obvious shackled slaves.