No man can be a Politician, except he be first an Historian or a Traveller; for except he can see what Must be, or what May be, he is no Politician: Now, if he have no knowledge in story, he cannot tell what hath been; and if he that not been a Traveller, he cannot tell what is: but he that neither knoweth what hath been, nor what is; can never tell what must be, or what may be. - James Harrington, THE COMMONWEALTH OF OCEANA, 1656