Indeed, most people are not shopping for other ideas. Most people are too busy with their lives to think too deeply about the world, and are content to simply l

Indeed, most people are not shopping for other ideas. Most people are too busy with their lives to think too deeply about the world, and are content to simply let the ideas find them. That is the bargain of politics: "give us power and we will tell what to think". For such people, Twitter is entirely sufficient. The design of twitter as a textual broadcasting platform is ideal for a unidirectional transmit/receive of ideas.