The British Empire owes its origins to the Normans and Gaulles as well as several Teutonic German tribes all of who practiced slavery in the ancient world. The practice of concurring territory and enslaving their population was perfected by the Roman’s who considered enslavement a more useful option than the standard practice of killing every man, woman, and child before pillaging their property. In Roman culture slaves were actually considered as dead and had no rights so that anything that you did to them was mild by comparison.
If we’re going to start judging our ancestors for their primitive behavior we’re going to have to go back a long way.
I’m simply comparing the actions of our Founders, which is relevant, to the actions of that “marked by every act which may define a Tyrant” to quote the Declaration.
One side stood first toward anti-slavery efforts. It wasn’t England.