Two years after Thick as a Brick 2, an explicit 2012 sequel to the 1972 prog classic, Ian Anderson embarked on another ambitious journey, this time assembling a concept record called Homo Erraticus. A loose – very loose – album based on a "dusty, unpublished manuscript, written by local amateur historian Ernest T. Parritt (1873-1928)," Homo Erraticus is an old-fashioned prog record: it has narrative heft and ideas tied to the '70s, where jazz, classical, folk, orchestral pop, and rock all commingled in a thick, murky soup…