"The crossroads of trade are the meeting place of ideas, the attrition ground of rival customs and beliefs; diversities beget conflict, comparison, thought; superstitions cancel one another, and reasons begins."Will Durant, The Life of Greece p. 135 (15th ed. 1939). He's looking ahead to the Port of Athens.
But think blogosphere. I have seen a couple of good articles explaining why a network of thinkers can produce better results than a resource-rich newsroom. Hayek has something to say about that too. To get the idea into a single sentence is impressive.