Q.What intellectual developments in eighteenth- and nineteenth-century Europe – such as new ideas about reason, science, and the individual – helped give rise to sociology as a discipline?

The Enlightenment's new emphasis on reason, scientific/empirical method, and the individual made it possible to study society systematically for the first time. …

The chapter identifies a specific set of intellectual developments in eighteenth- and nineteenth-century Europe, associated with the Enlightenment, as the intellectual foundation that made sociology possible as a discipline.

The first development was a new confidence in human reason. Where earlier explanations of the world had relied heavily on religious authority and inherited tradition, Enlightenment thinkers promoted the idea that people could use their own rational faculties to understand and question the world, rather than simply accepting explanations handed down by custom or authority. This opened the door to treating society itself, not only nature, as something that could be examined critically and rationally rather than simply taken as given.

The second development was a new respect for science as a method of understanding the world. The visible success of the natural sciences in explaining physical phenomena through careful, evidence-based, systematic investigation suggested that a similarly disciplined, empirical approach could be applied to human social life. This is the direct root of sociology's commitment to empirical investigation — studying society through careful evidence rather than through speculation, exactly the distinction the chapter later draws between naturalistic, common-sense explanations and properly investigated sociological ones.

The third development was a new emphasis on the individual as a meaningful unit with their own reason, agency, and rights, rather than as someone defined purely by their fixed, inherited position in a rigid traditional or feudal order. Once individuals came to be seen this way, new questions naturally arose about how individuals relate to the broader social order, what that order owes them, and how social arrangements might be judged or reformed through rational argument rather than accepted simply because they were traditional. …