Sociology was born in upheaval. In the late eighteenth and nineteenth centuries the French Revolution toppled an old political order, the Industrial Revolution pulled millions of people from farms into crowded cities, and traditional ties of village, church and guild loosened. Thinkers across Europe and America asked an urgent question: what holds a society together when everything familiar is changing? The answers they gave still shape how sociologists see the world.

Comte and Martineau

The French philosopher Auguste Comte coined the word sociology in the 1830s, combining Latin and Greek roots for the study of companions or society. Comte hoped for a science of society as rigorous as physics, built on observation rather than speculation, an approach he called positivism. Harriet Martineau, a British writer, translated and condensed Comte's work into English in 1853. She also wrote Society in America (1837) after two years of travel, and a short guide to observing the customs of other peoples. She is often called the first woman sociologist, and she criticized American slavery and the limits placed on women in a nation that claimed to love liberty.

Durkheim: what holds us together

Durkheim, whom you met in the last level, asked how societies stay unified. In The Division of Labor in Society (1893) he contrasted two kinds of unity. Small traditional communities, he argued, hang together through mechanical solidarity: people do similar work and share the same beliefs. Modern societies rely on organic solidarity: unity based on people's dependence on one another's specialized work. A baker, a nurse and a truck driver may share few beliefs, but each needs the others, the way organs in a body need each other. Durkheim also warned of anomie, a condition of normlessness in which old rules weaken before new ones take hold.

Weber: meaning and rationalization

The German scholar Max Weber insisted that sociology must explain behavior and also understand it. He called this Verstehen: understanding the meaning that actions have for the people who perform them. A wink and an involuntary twitch may look identical; only meaning tells them apart. In The Protestant Ethic and the Spirit of Capitalism (1904 to 1905) he argued that certain Protestant religious ideas encouraged the disciplined, methodical work and saving that helped modern capitalism take off. The claim showed that ideas, not only material conditions, can drive economic change. Weber also traced a long trend toward rationalization, the spread of calculation and formal rules into every part of life, and he worried that people might end up trapped in a rule-bound casing as hard as steel.

Marx, Du Bois and Addams

Karl Marx left sociology a lasting focus on conflict between groups over wealth and power. W. E. B. Du Bois, the first African American to earn a doctorate from Harvard (1895), published The Philadelphia Negro in 1899. It was a door-to-door study of Black life in one Philadelphia ward, combining surveys, maps and interviews, and it showed that the hardships residents faced came from discrimination and history, not from any inborn trait. It was among the first major empirical community studies in American sociology. Jane Addams cofounded Hull House in Chicago in 1889. It was a settlement house that joined research with social reform: residents mapped wages and nationalities block by block in Hull-House Maps and Papers (1895) and pressed for laws on child labor and sanitation. Addams later shared the 1931 Nobel Peace Prize.

Three perspectives

Later sociologists organized these ideas into broad perspectives, each a different lens. Functionalism sees society as a system whose parts work together to keep it stable. The American sociologist Robert Merton refined it by separating manifest functions, the intended and recognized purposes of a pattern, from latent functions, the unintended and often unrecognized consequences of a social pattern. The conflict perspective asks who benefits from an arrangement and who pays, and sees society as an arena of competing groups. Symbolic interactionism, rooted in the work of George Herbert Mead and named by Herbert Blumer in 1937, studies how people build society through everyday interaction and shared symbols. The first two look at large structures; the third works close to the ground. Most sociologists borrow from all three.

Worked example: a public library

Consider a city's public library. A functionalist notes its manifest function, lending books, and its latent functions: it is a warm place for people without homes in winter, a meeting place for immigrant parents, a source of free internet for job seekers. A conflict theorist asks why branches in wealthy areas stay open longer than those in poor ones, and who decides. An interactionist watches how a librarian and a teenager negotiate what counts as acceptable noise, and how the building's quiet rules are learned. Each lens catches something the others miss, and together they show the library as more than a room full of books: it is one of the few places where any person, whatever their means, is welcome.