I think AGI will turn out to be pretty simple (but still could take a long time). And it has arisen many times in other species, but didn't take off because no

I think AGI will turn out to be pretty simple (but still could take a long time). And it has arisen many times in other species, but didn't take off because not tied to survival value. If you put GI in charge of an animal, who knows whether what it will do will be in the animal's best interest? The human trick was brain architecture that somehow controls intelligence, while still being "in charge". The general nature of intelligence makes it difficult to control. Another way GI is tied to survival value in humans is general division of labour (and general trade), which other species lack.