There has been much controversy over the nature of the institution of slavery, the relative humanity or lack of it in those slave holding nations which practiced it, and its benign or baleful effects upon the blacks on whom it was inflicted. Much has been said about the harshness of Anglo-American slavery and the relatively mild nature of Spanish American slavery, which respected a slave's basic humanity and rights of person, property, and family. Yet little has been done to quantify and document how those attitudes applied in practice. We have had little precise information about the slave family as it existed in the Spanish American colonies and the extent or use of slave property, or about the slaves' access to the legal system that might protect and defend his person, his property, or his family. New sources and methodology have begun to challenge long-held assumptions about both Anglo-American as well as Spanish American slavery. If any conclusion is warranted, it may be that slavery varied widely from place to place and was influenced perhaps as much by differing economic circumstances as by differences in cultural attitudes.