Sociology is the scientific study of society . It is a social science (a term with which it is sometimes synonymous) which uses various methods of empirical investigation and critical analysis to develop a body of knowledge about human social activity. For many sociologists the goal is to conduct research which may be applied directly to social policy and welfare, while others focus primarily on refining the theoretical understanding of social processes. Subject matter ranges from the micro level of individual agency and interaction to the macro level of systems and the social structure.

The traditional focuses of sociology have included social stratification, social class, culture, social mobility, religion, secularisation, law, and deviance. As all spheres of human activity are affected by the interplay between social structure and individual agency, sociology has gradually expanded its focus to further subjects, such as health, medical, military and penal institutions, the Internet, and the role of social activity in the development of scientific knowledge.

Maximilian Karl Emil "Max" Weber (German pronunciation: [ˈmaks ˈveːbɐ]; 21 April 1864 – 14 June 1920) was a German sociologist, philosopher, and political economist who profoundly influenced social theory, social research, and the discipline of sociology itself.

Weber was a key proponent of methodological antipositivism, presenting sociology as a non-empiricist field which must study social action through interpretive means based upon understanding the meanings and purposes that individuals attach to their own actions. Weber is often cited, with Émile Durkheim and Karl Marx, as one of the three principal architects of modern social science.

Weber's main intellectual concern was understanding the processes of rationalisation, secularization, and "disenchantment" that he associated with the rise of capitalism and modernity. Weber argued that the most important difference among societies is not how people produce things but how people think about the world. In Weber’s view, modern society was the product of a new way of thinking. Weber is perhaps best known for his thesis combining economic sociology and the sociology of religion, elaborated in his book The Protestant Ethic and the Spirit of Capitalism. Weber proposed that ascetic Protestantism was one of the major "elective affinities" associated with the rise of capitalism, bureaucracy and the rational-legal nation-state in the Western world. Against Marx's "historical materialism," Weber emphasised the importance of cultural influences embedded in religion as a means for understanding the genesis of capitalism. The Protestant Ethic formed the earliest part in Weber's broader investigations into world religion: he would go on to examine the religions of China, the religions of India and ancient Judaism, with particular regard to the apparent non-development of capitalism in the corresponding societies, as well as to their differing forms of social stratification.

Alexis-Charles-Henri Clérel de Tocqueville (French pronunciation: [alɛksi or alɛksis də tɔkvil]; 29 July 1805, Paris – 16 April 1859, Cannes) was a French political thinker and historian best known for his Democracy in America (appearing in two volumes: 1835 and 1840) and The Old Regime and the Revolution (1856). In both of these works, he explored the effects of the rising equality of social conditions on the individual and the state in western societies. Democracy in America (1835), his major work, published after his travels in the United States, is today considered an early work of sociology and political science.

An eminent representative of the classical liberal^{[citation needed]} political tradition, Tocqueville was an active participant in French politics, first under the July Monarchy (1830–1848) and then during the Second Republic (1849–1851) which succeeded the February 1848 Revolution. He retired from political life after Louis Napoléon Bonaparte's 2 December 1851 coup, and thereafter began work on The Old Regime and the Revolution, Volume I.