Changes in the earth's climate caused ice sheets to grow and cover most of Canada and some of the northern US almost 15 000 years ago. This is known as the last Ice Age. For the last two million years, the earth has shifted between ice ages and warmer periods. Ice ages are caused by slight changes in the way the earth orbits around the sun. Huge continental glaciers or sheets of ice moved down from the Artic and covered Canada, North America and much of Europe.
The answer is: Contextual discrimination
Contextual discrimination is often used to make the perception that discrimination does not exist in the broader range, but it still is if we pay attention to specific details.
For example, compared to the majorities, criminals that came from minority background are much more likely to receive death penalty. Even though technically the treatment that they receive in jail is typically similar.
Your choice. I pick Mid-Atlantic, but I don't know why.