And as a person of Polish national origin, aren't you a descendant of slaves? The very word "Slav" comes from "slave".
[Middle English sclave, from Old French esclave, from Medieval Latin sclvus, from Sclvus, Slav (from the widespread enslavement of captured Slavs in the early Middle Ages). See Slav.]
The English word “slave” comes from the word Slav because so many Slavs were carried off into slavery, but the people living in the Slavic-speaking countries today (or their cousins whose ancestors emigrated from those countries) are descended from the ones left behind who were not enslaved.