How to write the ending after watching Uncle Tom's Cabin?

After reading the book Uncle Tom's Cabin, I understand that behind civilized capitalism is the ruthless exploitation of black slaves. The prosperity of America today is closely linked to the evil of slavery. But today, some Americans still discriminate against blacks. How I hope that every country in the world can protect the weak from hunger, cold, bullying and oppression. How I wish everyone in every corner of the world could be equal and have no hierarchy. I hope such evil and discrimination will disappear forever on this beautiful earth!