1) Europe developed slowly over time from various ethnic groups mixing together rather than descending from a single origin.
2) During the Roman Empire, some saw Europe as a unified political and geographic area from Spain to Greece under Roman rule. However, Romans themselves did not strongly identify with or promote a unified European identity.
3) It was not until the fall of the Western Roman Empire that a common European identity reemerged among intellectuals defending Europe and what remained of Roman political structures from barbarian invaders. They saw Europe as more than just a geographic area but as a key part of a shared identity.