Marvin Gaye’s career had so many phases, attracted so much attention, and experienced so much critical analysis that it’s hard to believe there’s anything left in his expansive catalog to be explored. But back in 1972, while testing the boundaries of a $1 million contract signed in the wake of his sociopolitical breakthrough "What’s Going On?", Marvin recorded a sensitive, socially conscious, and flat-out groovy collection of songs that today feels like a Rosetta Stone for the impulsive, restless experimentation that led to later classics like the 'Trouble Man' soundtrack, "Let’s Get It On", and "I Want You".