Silicon Valley isn’t known for architecture. So what is Rem Koolhaas, the most important architect of his generation, doing there? The Harvard professor says he wants to understand whether the changes to come — smarter cities, intelligent refrigerators, driverless cars — are “desirable or scary.” The verdict? “I don’t know,” Koolhaas says, perhaps being coy. He seems worried that as tech gets smarter, humans will become meeker and less free without even realizing it. Maybe he has designs on bringing change to the world’s tech capital.