1776 is the year for me to remember. My 1st cousin 6 times removed died August 27, 1776 in the battle of Long Island. I have never found any slaves in my family. Only 3% of the population had slaves and most of them were purchased from Muslims in Africa.
Even if you found a plantation of slaves in your family line, better still, a merchant slave ship, that isn't your problem. You were not brought up in the context of that era and you made no decision, directly or indirectly, towards acquisition.
We should be boasting about ONE thing: Negro spirituals. Whites cared enough about their slaves that they taught them the Bible so that they could make a decision for Jesus Christ for all eternity. In doing so, it ushered in a new genre of worship music. Winning!