Grammar check please?! Due today! I really need help!?

Where was King from-south of the US means outside of the United States-you should say where he was from. I think it should be They were both very educated activists that fought against those who treated others unfairly based on skin color. You were writing about King then brought in Mandela-you need to say who was Mandela and what he did, where he was from that way the rest of the paper makes sense.