By the 1700s, what about slavery had changed?

All enslaved people were of African descent.

Explanation:

Around 1700, Asante (or Ashanti) Empire of Akan who resisted British imperialism decided to sell their African captives to the Portuguese. Starting the slave trade that would end up in slavery being predominately oppressing people of African Descent in the West of the World. Before that, all sorts of peoples had slaves of many different ethnic groups.

i think they came to washington to protest