“If Alexander wept when there were no more worlds left to conquer,” critic Jack Hamilton said when Slate ran their “Wonder Week” feature, “Stevie happily composed 90 minutes of largely instrumental music for the soundtrack to a documentary about botany.”įavoring slowness as well as quicksilver mood shifts, spare balladry and additive composition, acoustic guitars and two $40,000 Yamaha GX-1 synthesizers, whimsical experimentation and near invisible incremental movement, an album with six credits for “special programming of synthesizer” and Wonder with almost all other instrumentation, it’s a flummoxing and charming album wherein Wonder sings about seeds, leaves, and ecology as he himself embodies the traits of his botanical muse. In almost every assessment, it marks the end of the greatest run in pop music history. In nearly any appreciation of Stevie Wonder’s profound run of music, Secret Life of Plants serves as a page break, a bookend, the arid valley after the vertiginous peak of the beloved Songs in the Key of Life.