Interesting review of a new book. Especially interesting is this bit from the author's interview with Nobel laureate Steven Weinberg:
When I brought up string theory, a melancholy strain became detectable in Weinberg’s voice.
“I was hoping that with string theory things would fall into place much more rapidly than they have,” he said. “But it’s been rather disappointing. I’m not one of those people who bad-mouth string theory. I still think it’s the best effort we’ve made to step beyond what we already know, but it hasn’t worked out the way we were expecting it would.”