He experienced the harsh reality of the underbelly of society.

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

He is deeply interested in social issues.

He deeply believes in the principles of socialism.

Maintaining social order is the responsibility of all of us.

He understands his responsibilities as a working adult.

After graduating from university, you have to prepare to enter the real world.

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

The Calopteryx cornelia is a species endemic to Japan, and it has beautiful wings.

He is studying the history of National Socialism.