Right. The myth actually originates from Social Darwinism - https://en.wikipedia.org/wiki/Social_Darwinism which was what influenced Jack London's thinking (see "The Call of the Wild", "White Fang" etc.) but at the same time he was also a Socialist (see "The Iron Heel", "The People of the Abyss" etc.) See his "views" section here - https://en.wikipedia.org/wiki/Jack_London#Views