or mass wasting

Bulk movements of soil and rock debris down slopes, or the sinking of confined areas of the Earth's ground surface. The term mass wasting refers only to gravity-driven processes that move large masses of earthen material from one place to another. The term mass movement includes the sinking of confined areas.

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Mass movement refers to the political concept of a political party or movement which is supported by large segments of a population. Political movements which typically advocate the creation of a mass movement include the ideologies of communism and fascism. Both communists and fascists typically support the creation of mass movements as a means to overthrow a government and create their own government, the mass movement is then used afterwards to protect the government from being overthrown itself.