An indomitable intellectual dynamo, this was Ben Barber. We were colleagues and friends. He invited me to many events, including an unforgettable conference in Berlin. He was enthusiastic, energetic, firm in his convictions. He believed that democratic politics must be defended against rabblerousers, mountebanks, and scoundrels. His book “Cool Cities: Urban Sovereignty and the Fix for Global Warming” was published last week by Yale University Press. Blessed be his memory….