A jury is a sworn body of people convened to render an impartial verdict (a finding of fact on a question) officially submitted to them by a court, or to set a penalty or judgment. Modern juries tend to be found in courts to ascertain the guilt, or lack thereof, in a crime. In Anglophone jurisdictions, the verdict may be guilty or not guilty (not proven in Scotland). The old institution of grand juries still exists in some places, particularly the United States, to investigate whether enough evidence of a crime exists to bring someone to trial.The jury system dates back to 5th Century BCE Ancient Greece, where members of the Boule, or Council (and other institutions, such as judicial courts) were selected from the male citizenry by lot. This process had two distinct advantages: Firstly, all citizens were considered, for socio-political purposes to be fundamentally equal, and, secondly, the process prevents corruption. The Boule (and hence the jury) were at the core of the original Athenian Democracy. The modern criminal court jury arrangement has evolved out of the medieval juries in England. Members were supposed to inform themselves of crimes and then of the details of the crimes. Their function was therefore closer to that of a grand jury than that of a jury in a trial.