/ˌsoʊsiˈɒlədʒi/
[noun] The scientific study of human society, including how people live together, form groups, create rules, and influence each other. It looks at things like culture, class, family, and social change.
Sociology is a linguistic hybrid — a Latin-Greek mashup so awkward that purists of the 19th century complained it was grammatically illegitimate from birth.
The word 'sociology' was coined in 1838 by the French philosopher Auguste Comte, who used it in his monumental work 'Cours de philosophie positive'. Comte needed a name for what he believed was the highest of all sciences — the systematic study of human society — and he built the word by fusing two very different languages in a way that immediately annoyed classical scholars. The first half comes from the Latin 'socius', meaning 'companion' or 'ally', a word rooted in the idea of people bound together by shared ties. The second half was borrowed from the Greek '-logia', meaning 'the study of' or 'the science of', itself derived from the Greek word 'logos', meaning 'word', 'reason', or 'discourse'.
The problem that critics pointed out was simple: mixing Latin and Greek roots in a single word was considered a grammatical sin in educated European circles. A truly Latin word would have been 'sociologia' built entirely from Latin stock, and a Greek word would have used a Greek prefix. Comte, however, was not bothered by the complaint. He had already used the term 'social physics' and felt it had been stolen by the Belgian statistician Adolphe Quetelet, so he needed something new and distinctive. The hybrid 'sociologie' in French became his trademark term, and it stuck.
The Latin root 'socius' has a rich history of its own. It comes from the Proto-Indo-European root '*sekw-', meaning 'to follow', which gave rise to a cluster of important Latin words. From 'socius' came 'societas', meaning 'partnership' or 'fellowship', which passed through Old French as 'societé' before entering English as 'society' in the 16th century. The same Latin root also gave English 'associate', through Latin 'associare' meaning 'to join with', and 'social', through Latin 'socialis'. All of these words carry the core idea of people choosing — or being compelled — to walk together.
The Greek suffix '-logia' had already proven enormously productive in English long before Comte invented sociology. Ancient Greek 'logos' had generated dozens of fields of study that entered English via Latin and then French: 'theologia' became 'theology', 'biologia' became 'biology', 'geologia' became 'geology'. By the time Comte wrote in the 1830s, the pattern '-ology' was so well established in scientific naming that attaching it to any subject immediately suggested serious, systematic inquiry. That was precisely the impression Comte wanted to create — he was claiming that the study of society deserved the same rigorous, scientific status as physics or chemistry.
The word moved from French into English relatively quickly, appearing in English texts by the 1840s. The British philosopher Herbert Spencer was particularly important in spreading it through the English-speaking world. Spencer wrote extensively about sociology in the 1860s and 1870s, helping to establish it as an academic discipline. By the late 19th century, universities in Europe and North America were creating sociology departments, and the word had shed its controversial reputation as a mongrel hybrid. Today, few people who use it give a second thought to the Latin-Greek quarrel at its heart — or to the ambitious French philosopher who decided that human society was finally ready to be treated as a science.