The Evolution of Homo Sapiens

Homo erectus is just a name put on something that is human-like, which we clearly did evolve from. It's not as though one day two Homo erectuses had sex and then nine months later the modern human was born. So what you're saying is that basically the entire tribe, I guess, of people had a collective mutation between them. And those mutations persisted until the entire tribe evolved into Homo sapiens. They're still kind of humans but they're an older version of humans.