And as the saying goes, “humans are the least general intelligence which can manage to take over the world at all”—otherwise we’d have taken over the world earlier.
Far from being the smartest possible biological species, we are probably better thought of as the stupidest possible biological species capable of starting a technological civilization—a niche we filled because we got there first, not because we are in any sense optimally adapted to it.
A classic statement of this is by Bostrom, in Superintelligence.