The Moody Blues' first real attempt at a harder rock sound still has some psychedelic elements, but they're achieved with an overall leaner studio sound. The group was trying to take stock of itself at this time, and came up with some surprisingly strong, lean numbers (Michael Pinder's Mellotron is surprisingly restrained until the final number, "The Balance"), which also embraced politics for the first time ("Question" seemed to display the dislocation that a lot of younger listeners were feeling during Vietnam)…