Just a moment...
Much of our seeming intelligence actually comes not from raw brainpower or a plethora of instincts, but rather from the accumulated repertoire of mental tools (e.g., integers), skills (differentiating right from left), concepts (fly wheels), and categories (basic color terms) that we inherit culturally from earlier generations.
Joseph Henrich • The Secret of Our Success: How Culture Is Driving Human Evolution, Domesticating Our Species, and Making Us Smarter
In Chapter 1, we discussed how each human has two “minds”—the Primitive Mind with its fiery flame and the Higher Mind with his orb of clarity and consciousness. So when humans band together, they can generate a double emergence phenomenon.
Tim Urban • A Game of Giants — Wait but Why

Collective intelligence is created when people work together, often with the help of technology, to mobilise a wider range of information, ideas and insights to address a social challenge.