whats is it called and when did we start to think like humans?

Answer 1

"integrated consciousness," about 50,000 years ago.

Prior to that, between 125,000 and 50,000 years ago, there were anatomically correct humans, who did not think like us. This was a real "cultural revolution." By the way, this occurred before the Australian aborigenes were isolated -- so all people living today are all "modern humans," Homo sapiens sapiens.

Answer 2

There was no exact point at which we began to think like humans. There isn't even a good definition of what it might mean to think like a human.

The more research done with our closest living relatives (chimpanzees), the less clear the difference becomes. Chimpanzees and other great apes can look in a mirrow and know they are looking at themselves, for instance. So they have a "sense of self" just like people.