 Adolph Murie, an ecologist, was a pioneering advocate of bio-diversity and was a major promoter of the Denali National Park.Margaret Murie (married Olaus, 1924) helped bring about the passage of the Alaska National Interest Lands Conservation Act, the greatest land preservation act in U.S. history, and was the recipient of the Presidential Medal of Freedom in 1998.Louise Murie (now MacLeod), a botanist, accompanied her husband Adolph (married 1932) on twenty-five expeditions to Mount McKinley (now Denali) National Park.