Baloney.
For each slave which made it to this continent two died in the attempt to get him here. That produced a holocaust which rivals Hitler's. Mass Murder.
Americans of this day and age have far more freedoms than did any of their ancestors, except possibly the slavers. There is no doubt about this and ideological silliness doesn't change it. Nor does a yearning for a world which never existed. To claim otherwise is just another demonstration of ideology try to trump reality.
Brought here by YANKEES.