With brains that process information almost like a computer, the sea creatures already use tools and can be social. But they need to make a few changes before they can take over the world.
Humans didn't evolve and then start using tools, our ancestors used crude tools, much like many of he species you listed occasionally do, which resulted in an evolutionary selection bias for those who could best make use of tools. Tool use created humans and it in time could create descendants of those other species who are much more capable of using tools.
Yeah, that is true. Still, primates at least had a pretty good base from which to work towards evolving to use tools - hands, relatively high intelligence, and decent lifespans. I don't even know how you'd go about giving a dolphin or ravens grippers. Octopi and rats have a decent base to work with in terms of grabbing things, but they would need to evolve to extend their lifetimes several times over before they could reasonably maintain a civilization.
Tbh as someone else said, it's most likely some other primate species would take over in the meantime since they're much closer.
Humans didn't evolve and then start using tools, our ancestors used crude tools, much like many of he species you listed occasionally do, which resulted in an evolutionary selection bias for those who could best make use of tools. Tool use created humans and it in time could create descendants of those other species who are much more capable of using tools.
Yeah, that is true. Still, primates at least had a pretty good base from which to work towards evolving to use tools - hands, relatively high intelligence, and decent lifespans. I don't even know how you'd go about giving a dolphin or ravens grippers. Octopi and rats have a decent base to work with in terms of grabbing things, but they would need to evolve to extend their lifetimes several times over before they could reasonably maintain a civilization.
Tbh as someone else said, it's most likely some other primate species would take over in the meantime since they're much closer.