To take it a little further - if you stretch the conventional definition of intelligence a bit - we already assemble ourselves into a kind of collective intelligence.

Nations, corporations, clubs, communes -- any functional group of humans is capable of observing, manipulating, and understanding our environment in ways no individual human is capable of. When we dream of hive minds and super-intelligent AI it almost feels like we are giving up on collaboration.

We can probably thank our individualist mindset for that. (Not that it's all negative.)