We should think deeply about the reform of the social security system.

His sociability is an important factor for his success as a leader.

Social justice means that all people are treated equally.

He is deeply interested in social issues.

He used to be a member of the Chinese gang.

He experienced the harsh reality of the underbelly of society.

In psychology, it is important to understand the mechanism behind human behavior.

We adopted the AA system to start a new project.

Monarchy still exists in some countries.

Bureaucracy plays an important role in the operation of the government.