The two regions with the highest risk of social unrest are:

1. Europe and Africa

2. Latin America and Asia

3. South America and North America

4. Sub-Saharan Africa and the Middle East-North Africa region

Answer:Sub-Saharan Africa and the middle East-North Africa region.

Explanation: Over the past two decades their have been lot of social unrest in the middle East, Sub-Saharan Africa and North African chiefly due to activities of Religious extremists and rebel groups, For instance, in Nigeria (which is in Africa) there have been activities of Boko haram terrorist group which have displaced a lot of people living in the affected states and causing death and injury of many. Also, Syria suffered unrest due to activities of rebellious groups. All these activities and more puts these region at a very high risk of social unrest.