From the time of the herbals, biologists (and clerics) have grappled with something summarized as a “natural system” of living things. Whether this term strove to reveal what God had on his mind during creation week, or the revelation of “survival of the fittest” not requiring a God, was (and remains) a personal decision, but one step has always dealt with grouping the living objects; what became known as “species” which are grouped into “genera,” which can be gathered into “families,” “orders” and “kingdoms.” As put forward in the narrative above, mycology, including the fleshy fungi (and the subset, mushrooms), was not on the leading edge of this quest, the priests of the discipline exercised their individual mindsets over the questions which shrouded the problem: what is a species (see Chapter “ Home and Away ”)? What is a genus (see Chapter “ Poking and Proding ”)? What taxonomic breadth defined a genus—or subgenus—or section? How to define these terms, and employ them without prejudice.