The concept of the struggle for existence concerns the competition or battle for resources needed to live. It can refer to human society, or to organisms in nature. The concept is ancient, and the term struggle for existence was in use by the end of the 18th century.

Which one is the struggle for existence?

The struggle for existence is a natural history [metaphor]. It refers to the competition between living things to survive. This, and the similar phrase struggle for life, were used over 40 times by Charles Darwin in the Origin of Species, and the phrase is the title of chapter 3 of the Origin.

Who is best known for struggle for existence?

Darwin considered the struggle for existence in a wide sense, including the competition of organisms for a possession of common places in nature, as well as their destruction of one another.