Homo consumericus
Homo consumericus (mock Latin for consumerist person) is a neologism used in the social sciences, notably by Gad Saad in his book "The Evolutionary Bases of Consumption" and by Gilles Lipovetsky in "Le Bonheur Paradoxal". According to these and other scholars the phenomenon of mass consumption could be compared to certain traits of human psychology described by evolutionary scientists pointing out similarities between Darwinian principles and consumer behaviour. Lipovetsky has noted that modern times have brought about the rise of a "third" type of "Homo consumericus," who is unpredictable and insatiable. A similar expression "Homo Consumens" was used  by Erich Fromm in "Socialist Humanism", written in 1965. There Fromm wrote on Homo consumens: "Homo consumens is the man whose main goal is not primarily to "own" things, but to "consume" more and more, and thus to compensate for his inner vacuity, passivity, loneliness, and anxiety." The expression "Homo Consumens" was used by several other authors, including Mihailo Marković.