The tradition of studying past thinkers in their own historical context, attempting to recover the inner logic of a worldview rather than treating it as an anticipation of, or a failed approximation to, contemporary positions.
Arthur Lovejoy founded the field as a discipline, tracing persistent unit-ideas across centuries in The Great Chain of Being (1936). Isaiah Berlin practiced something looser and more influential — an essayistic recovery of thinkers on their own terms, including thinkers he found repellent, on the principle that a position must be understood at its strongest before it can be answered. His work on the Counter-Enlightenment made figures like Maistre and Herder intelligible to readers who had inherited only a caricature.
The Cambridge school then challenged Lovejoy's method directly. Quentin Skinner argued in 1969 that ideas do not float free of their occasions, that texts are speech acts performed in particular polemical situations, and that asking what a work contributes to a timeless debate is a category error which reliably produces anachronism. Pocock traced political languages rather than doctrines; Koselleck, working in parallel in Germany, made the history of concepts a study of how the meanings of political words shift as the experience of time itself changes.
The methodological argument has not been settled, and it has real stakes for a site like this one. Contextualism protects against reading modern preoccupations into Locke or Aristotle; its critics reply that if a text means only what it meant to its first audience, the canon becomes an antiquarian exercise with no claim on present argument. Most working intellectual historians now operate somewhere between the two, using context to discipline interpretation rather than to foreclose it.