On this installment of ST, a fascinating discussion with the Tennessee-based storyteller and performer Jim Pfitzer, who will soon appear onstage in Tulsa in "A Standard of Change," the one-man play that he created about the life and work of Aldo Leopold (1887-1948). An influential American author, scientist, ecologist, forester, and conservationist, Leopold -- the "father of wildlife biology," as some have called him -- is probably best known as the author of "A Sand County Almanac," which is a literary classic that's especially popular with environmentalist readers. "A Standard of Change" will be performed by Pfitzer on Saturday afternoon, the 25th, at 2:30pm, at the TCCL's Hardesty Library (at 8316 E. 93rd Street) in Tulsa. As Pfitzer tells us on today's show, his play aims to explore the dramatic if not transformative changes within Leopold's thinking vis a vis humanity's relationship with nature, with animals, and with "wild" places. You can learn more about this upcoming production here.