In Marvin Gaye’s 1971 song Mercy, Mercy, Me (The Ecology), Gaye sings, “What about this overcrowded land, how much more abuse from man can she stand?” Gaye was tapping into a flourishing environmental movement of the ‘70s. This is where the “Yes In My Backyard” (YIMBY) has come in, a pro-housing movement that encourages new housing, urban development, and opposes density limits.