A former Chicago middle school principal married to a Music Row songwriter, Poster could’ve come to Nashville, poured himself a tall sweet tea and settled into his La-Z-Boy. Instead, the teddy-bearish activist nicknamed “Spoofer” has pitched in on progressive causes all over the city, from public education to immigrant rights to poverty reform — greeting each with rolled-up shirt sleeves rather than lip service. The Windy City’s loss is Music City’s gain.

