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

Changes in the social system inevitably occur with time.

Social justice means that all people are treated equally.

He used to be a member of the Chinese gang.

He experienced the harsh reality of the underbelly of society.

The government declared a state of emergency to prevent the spread of the new coronavirus.

He always proactively suggests new ideas.

He likes to take a walk in the park at dusk.

He is a person of strong vanity who reads self-improvement books.

The prepositional case plays an important role in English grammar.