Global stratification may sometimes simply be divided into two groups, based on how wealth is distributed among their populations. These categories are described as

The answer is: Social class

Social class is generally divided based on how much resources that those people have to influence a change in the society where they lived in.

In almost all modern societies, social class will clearly distinguished by the wealth/money that people possessed. So the society is divided into two, the poor and the rich.

People who had vast amount of wealth, could have larger influence in changing the society because they can funded their activism group or influence the legislation by giving funding to the government representative of their choosing.