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.
In public relations and communication science, publics are groups of individual people, and the public (a.k.a. the general public) is the totality of such groupings. This is a different concept to the sociological concept of the Öffentlichkeit or public sphere. The concept of a public has also been defined in political science, psychology, marketing, and advertising. In public relations and communication science, it is one of the more ambiguous concepts in the field. Although it has definitions in the theory of the field that have been formulated from the early 20th century onwards, it has suffered in more recent years from being blurred, as a result of conflation of the idea of a public with the notions of audience, market segment, community, constituency, and stakeholder.
Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework.
The greater part of what passes for diplomatic history is little more than the record of what one clerk said to another clerk.
G. M. Young, Victorian England: Portrait of an Age (1936)
Today is Yesterday's Pupil.
Benjamin Franklin, Poor Richard's Almanack (1751).
The great historian John Hope Franklin, who helped to get this museum started, once said, “Good history is a good foundation for a better present and future.” He understood the best history doesn’t just sit behind a glass case; it helps us to understand what’s outside the case. The best history helps us recognize the mistakes that we’ve made and the dark corners of the human spirit that we need to guard against. And, yes, a clear-eyed view of history can make us uncomfortable, and shake us out of familiar narratives. But it is precisely because of that discomfort that we learn and grow and harness our collective power to make this nation more perfect.
Barack Obama, Remarks by the President at the Dedication of the National Museum of African American History and Culture at the National Mall in Washington, D.C. (24 September 2016)