system
A chat on 4chan
human
I don't know what happened exactly either but I like reading about these modern experiments where they show apes in captivity how to make fire and cook simple foods, like bacon and eggs etc but the apes never replicate it or pick it up. In the wild, many apes use simple tools like spears for fishing but apparently only humans have gone beyond that. The most obvious difference would be fire. So far, all the apes have been uninterested in fire and cooking.
But maybe these experiments don't work because animals in captivity know they get food from the humans so they stop doing anything.
So the basic evolutionary staircase would be tools -> thumbs -> fire
gpt
I meant thumbs -> tools -> fire