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.

What is today's date?

Kōzuke Province was one of the provinces that once existed in Japan.

The Indo-European languages are some of the most widely spoken in the world.

I am very interested in sociolinguistics.

He is studying the history of National Socialism.

He deeply believed in the principles of state socialism.