By studying the political science of government and economics in different countries.
Step-by-step explanation:
Geographers are specialized people who describe the physical, environments, human features and people's interaction on earth. Human Systems describe how humans settle in the earth, created permanent features, formed societies and ongoing actions and ideas of the people.
Also, they interested in identifying the interdependence of the people. They will be studying politics and the economic activities of people all over the world. This study is also known as cultural geography or Human geography that includes human activities and the relationship to the physical and cultural environments.
The study of politics and economics will provide them with information like how people were governed and how people's lives were changed (economically) at a period of time in a particular region.