Humams are also an invasive species out of its original ecological niche. They were supposed to stay in Africa with the hyenas, cocodriles and lions keeping them in check.
Once humans learned to throw sharp sticks and not venture too far alone the threat of any predators is greatly diminished. The moment any kind of civilization formed there’s no amount of hyenas and Crocs and lions that could keep humans in check. I doubt the civilizations of ancient Nubia lived in fear of predators.