Thomas J. Elpel has authored numerous books on topics ranging from wilderness survival and botany to stone masonry, sustainable construction, and green economics.

He is the founder of Green University® LLC and Outdoor Wilderness Living School LLC (OWLS), as well as HOPS Press LLC and the Jefferson River Canoe Trail.

As a child, Tom was mentored by his grandmother, Josie Jewett. Together they explored the hills and meadows near Virginia City, Montana, collecting herbs, looking for arrowheads and watching wildlife. Grandma Josie helped Tom to learn about native plants and their uses, igniting a passion for nature that has inspired him ever since. She also sparked his interest in survival skills.

Tom's first serious exposure to wilderness survival skills began at the age of 16, when he went on a 26-day, 250-mile walkabout in the desert canyons of southern Utah with Boulder Outdoor Survival School. The following year he and Grandma Josie went together to Tom Brown's Tracker School in New Jersey.

From there Tom spent thousands of hours practicing, developing, and teaching survival skills in his "backyard" in the Rocky Mountains. These experiences led to writing his book Participating in Nature: Wilderness Survival and Primitive Living Skills.

Tom's basic philosophy is that wilderness survival skills are useful to connect with nature, yet you shouldn't run away from the problems of modern society. Instead, we need to apply the lessons of living close to nature to the challenge of solving our worldly problems.

Outdoor Wilderness Living School LLC is dedicated to providing Stone Age living skills classes and camping trips to public school groups. Tom launched Green University® LLC in 2004 to expand the curriculum from teaching merely primitive skills outward towards addressing issues of global sustainability.

In 2019 Tom enlisted former Green University students and led a "Missouri River Corps of Rediscovery" down the 2,341-mile Missouri River, as told in his award-winning book Five Months on the Missouri River: Paddling a Dugout Canoe.