Native Americans are known to have lived and hunted in the area nomadically, but did not establish permanent settlements there before the Alabama–Coushatta settled in the northeast about 1780. Spanish explorers and missionaries generally avoided the area and routed their roads around it. Logging in the late nineteenth and twentieth centuries dramatically reduced the forest concentration. Efforts to save the Big Thicket from the devastation of oil and lumber industries started as early as the 1920s with the founding of the East Texas Big Thicket Association by Richard Elmer Jackson. In recent years, claims of the Big Thicket's position as a "biological crossroads" and its uniqueness have been called into question by some, arguing that the same habitat that occurs in Southeast Texas extends into Louisiana and eastward; however the importance of saving a representative sample of the Big Thicket was not questioned and regarded as something "for which we must be eternally grateful" by the same authors.