History (from Greek ἱστορία, historia, meaning “inquiry, knowledge acquired by investigation”) is the study of the past as it is described in written documents. Events occurring before written record are considered prehistory. It is an umbrella term that relates to past events as well as the memory, discovery, collection, organization, presentation, and interpretation of information about these events. Scholars who write about history are called historians.

History can also refer to the academic discipline which uses a narrative to examine and analyse a sequence of past events, and objectively determine the patterns of cause and effect that determine them. Historians sometimes debate the nature of history and its usefulness by discussing the study of the discipline as an end in itself and as a way of providing “perspective” on the problems of the present.

The Greek word was borrowed into Classical Latin as historia, meaning ‘investigation, inquiry, research, account, description, written account of past events, writing of history, historical narrative, recorded knowledge of past events, story, narrative’. History was borrowed from Latin (possibly via Old Irish or Old Welsh) into Old English as stær (‘history, narrative, story’), but this word fell out of use in the late Old English period.

Those who cannot remember the past are condemned to repeat it.
—George Santayana