These are Portugal and Spain.
Fun fact: did you know that the border separating those two countries is the oldest on earth (excluding natural borders)? It's been almost the same for around 1000 years (but recently they swapped a little land...)
Apartheid began in South Africa, where they segregated people of different races. Under this policy, the rights of the majority of Africans was neglected and the Afrikaner (the white people living in South Africa) had control. Apartheid started after World War 2, and ended in 1991.
Xenia is the Greek tradition of hospitality practices between a guest (esp. bringing a gift) and host (esp. providing the gift of shelter and/or food) with both displaying appreciation and respect for the other.
It was an important idea to the Greeks who wanted to please their gods. Just in case one was interacting with one of the gods, as either a guest or host, it was important to leave a good impression.