I took three economics class in college. While a couple discussed slave based labor systems, none predicted how slave based labor system in the 20th and 21st Centuries would work. Slave based labor systems were seen as obsolete by the start of the 20th Century. This leaves me with a lack of knowledge of how slave based labor systems would have function the the 20th and 21st Century. I predict that by the 21at Century, many nations using labor bested economic systems would have sanctioned nations who relied on slave based labor systems. To be blunt, slave labor based products in 1960 would not sell well in free labor nations. Then again I might be mistaken and products from slave labor systems may well have be acceptable well into the 21st Century and beyond. Who knows?