How did geographic conditions limit contact between africans and people from outside of the middle east?

Sahara desert was a large isolating buffer that prevents eastern and sub-saharan African peoples from consistent contact with other peoples. The middle east was the only civilzation with land connection to the rest of Africa an stood in between Africans and the rest of the known world.

slavery, abortion, donald trump, gay marriage, racial rights, immigration  

explanation:

anything that has been broth up to the supreme court is something of grate political divide   so just look as court cases

the three roles stated in the dialogue develop the siblings' personalities.

lloyd's personality looks like a trademarketer

dana's personality is afraid from lloyd's behavior and the oldest sister is a decided person who tries to solve any conflict