Ignoring humans both land and water animals have some heavy hitters when it comes to intelligence.
But the main benefit of primates as are
1. Tool use. We has hands.
2. Wisdom and the ability to pass on knowledge.
Octopus are extremely smart. But they don’t really pass on knowledge and they themselves have short life spans.
Dolphin and whale are smart and can pass on knowledge but can’t really use tools effectively
Some birds like crows and raven are very smart and pass on knowledge but don’t particularly have great tool use.
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