In 1948, Aldo Leopold, who later became recognized as the father of the environmental movement, died of a heart attack while fighting a neighbor's wildfire. His seminal book, A Sand County Almanac, was pothumuously published in 1949. Twenty-five years earlier Sunset Magazine published Leopold's essay, "Pioneers and Gullies" (May, 1924). Sounding like NASA's James Hansen clamoring about climate change, here's Leopold in Sunset, "Soil is the funamantal resource, and its loss the most serious of all losses." Leopold goes on to suggest that a science of erosion control be taught in universities and that land regulation become the norm in order to fend off the blatant destruction that human development always causes. I'm honored to be Sunset's Innovator #4 in a new BIG IDEAS segment that may become an annual event, at least for magazine subscribers or folks who pick up the actual, physical journal somewhere. But, here, for now, please enjoy the bare bones of it--and look for my seminal almanac circa 2040.