I find speculating on the future to be at times fun, terrifying, worrisome, hopeful, inspiring, and sometimes even funny. This edge.org book contains only 25 essays. I wished it was like some of the other ones with more entries. Most of the topics covered are physics, technology, biology, and psychology. There wasn't any discussion of government, politics, ecology, social trends, or economics. I'd like to see Brockman do another book on the future, incorporating a wider range of subjects.