theories, known as theories of unilineal evolution. Sociocultural evolutionism became the prevailing theory of early sociocultural anthropology and social commentary, and is associated with scholars like Auguste Comte, Edward Burnett Tylor, Lewis Henry Morgan, Benjamin Kidd, L. T. Hobhouse and Herbert Spencer. Such stage models and ideas of linear models of progress had a great influence not only on future evolutionary approaches in the social sciences and humanities, but also shaped public, scholarly, and scientific discourse surrounding the rising individualism and population thinking. Sociocultural evolutionism attempted to formalise social thinking along scientific lines, with the added influence from the biological theory of evolution. If organisms could develop over time according to discernible, deterministic laws, then it seemed reasonable that societies could as well. Human society was compared to a biological organism, and social science equivalents of concepts like variation, natural selection, and inheritance were introduced as factors resulting in the progress of societies. The idea of progress led to that of a fixed "stages" through which human societies progress, usually numbering threesavagery, barbarism, and civilizationbut sometimes many more. At that time, anthropology was rising as a new scientific discipline, separating from the traditional views of "primitive" cultures that was usually based on religious views. Already in the 18th century, some authors began to theorize on the evolution of humans. Montesquieu (1689–1755) wrote about the relationship laws have with climate in particular and the environment in general, specifically how different climatic conditions cause certain characteristics to be common among different people. He likens the development of laws, the presence or absence of civil liberty, differences in morality, and the whole development of different cultures to the climate of the respective people, concluding that the environment determines whether and how a people farms the land, which determines the way their society is built and their culture is constituted, or, in Montesquieu's words, the “general spirit of a nation”. Over time, as societies evolved from simple to complex, however, humans came to be governed less and less by the environment (at least those in temperate climates) and its influence was replaced by moral and legal forces. Also Jean-Jacques Rousseau (1712–1778) presents a conjectural stage-model of human sociocultural evolution: first, humans lived solitarily and only grouped when mating or raising children. Later, men and women lived together and shared childcare, thus building families, followed by tribes as the result of inter-family interactions, which lived