"At this time America the continent was split between 4 colonial powers, Spain, Dutch French and English. The 13 English colonies only had indentured British Isles subjects (slavery itself being illegal in England) and transported 'criminals' therefore every last 'slave' was white up until long past the war of independence. In French and Dutch areas black slavery was rife and the Dutch were known for particular brutality because Americans and English complain about what they used to see.
When those states belonging to the Netherlands, France and eventually Spain were brought into the Union, their laws, practices and population (along with their black slaves) came in with them during which time slavery being an industry, corporations, churches and individuals had invested in plantation ownership in the Southern United states importing slaves from the Spanish colonies and an entire class of patrician slaves owners who were English Catholics originating from English Civil war exiles who migrated into the Southern states from Caribbean Islands - an actual flood in 1830 their plantations in British territories were under Abolition and they had oodles of slush money from the British taxpayer as compensation, so they started again with news slaves in the Colonies with every intention of never having their influence and wealth endangered again.
At this point you should notice several things.
a) The majority of the slaves in the English Colonies were white, Irish/Scott West Country English and the majority of Americans are therefore descended from these slaves.
b) Ownership of a Slave for life was considered illegal in all the original states, you were permitted an indentured servant for a period of time(Contract employee) or a state could use criminals for hard labour both practices still exist.
c) The majority of the practice of black slavery was imported into the colonies from French, Dutch and Spanish
d ) The English Corporation slave plantations were equal opportunity and did not care about your colour, just your price.
e) The white people descended from the British Isles in the United States of America have take the blame for Old Aristocracy's greed, corporate investment trusts, European banks, Church funds from the likes of the Quakers who all run and owned plantations. Yet the majority of white people in the Americas originated from freed white slaves."