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Brain size isn't necessarily a very good correlate of intelligence. For example dolphins and elephants have bigger brains than humans, and sperm whales have much bigger brains (5x by volume). Neanderthals also had bigger brains than modern humans, but are not thought to have been more intelligent. A crow has a small brain, but also has very small neurons, so ends up having 1.5B neurons, similar to a dog or some monke…
Don’t assume whales are less intelligent than humans. They’re tuned for their environment. They won’t assemble machines with their flippers but let’s toss you naked in the pacific and see if you can communicate and collaborate with peers 200km away on complex hunting strategies.
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