His answer is the octopus. What say you?
They are marine which makes fire impossible which severely limits industrial advancement. Similarly they are not social animals which negates a lot of the division of labour advantages of a society. While a species of octopus might advance intellectually to ponder its own existence I doubt it could achieve the infrastructure necessary to significantly control its environment.
Donβt forget that they only live 1-2 years. 3 tops. I think this is even more limiting than fire. And if evolutionary pressure leads to longer lifespans somehow, they must overcome the whole dying after mating thing.
They could use the underwater volcanoes to smeltle the meltle though, thought of that? Checkmate.