Terry
We are talking about the world in the 16th Century. Not sure what were protestant countries in Feudal Europe doing against slavery at the time. All we know is that slavery is very much alive in the 21st Century.
Jesuits were also a Spanish Catholic Order that nowadays have been replaced by the Opus Dei, which looks more like a protestant joke than anything else.
And no need to get so heat up about the Spanish being the first to do something against slavery. Americans can actually be the ones freeing the world from it once and for all. Hopefully this time for real.