shacks are generally composed of scavenged man-made materials like abandoned construction debris, repurposed consumer waste and other useful discarded objects that can be quickly acquired at little or no cost and fashioned into a small dwelling.
In Australian English, shack can also refer to a small holiday house with limited conveniences, for instance it may not have running water or electricity.
[3][4] In the frontier history of the United States, freethinkers have often used shacks—small, rundown buildings or structures—as a place to develop new ideas outside the literal confines of the establishment.
Professor Michael Lannoo and science writer and editor Eric Engles note the role of shacks in American culture as simple structures that "allow an uncluttered perspective on life's larger questions".
Lanoo writes that shacks played a large role in the development of environmental and ecological ideas and philosophy in the United States, allowing people to interact with and investigate nature at a closer level, particularly in the work of Henry David Thoreau, John Muir, Aldo Leopold, and Ed Ricketts.