There’s only one ancient world, although there’s quite a lot of it: more than three thousand years of human history spanning three continents. It’s the story of the rise of civilization in the third millennium BC, of the creation of a true world system, and its collapse in the twelfth century BC, of the long period in which the Mediterranean world became one single, Roman Empire, and of its disintegration. An age of emperors and kings, scribes and scholars, poets and historians, soldiers and citizens, priests and philosophers.
It’s a fascinating period. Studying it is fun. However, it is also important. After all, there are continuities from the distant past until now (most visibly in the monotheistic religions). For centuries, people have been inspired by Antiquity (the list of renaissances and classicisms is quite long).