How did the ancients live?

The creatures of the ancient times were significantly different from the creatures of today.

The culture of classical antiquity has a significant impact on the modern world.

The philosophy of Ancient Greece has a significant influence on modern thinking.

The buildings of Ancient Rome still inspire many people today.

He has a very passive personality.

His advice was very practical.

His target-like way of thinking is hard to understand.

He is my biggest enemy.

What is that target?