Nelson Mandela was one of the "giants" Barrack Obama refers to in his Nobel Peace Prize acceptance speech who received the prize before him. There were several other "giants" that Barrack Obama referred to also and they were King, Marshall and Schweitzer. I hope this answer comes to your help.
Answer:back then people who favored republicanism were pro slavery, so the skulls represent the slaves and sitting on top of it is a wealthy man. who profits from the slaves
