If nature has made any one thing less susceptible than all others of exclusive property, it is the action of the thinking power called an idea, which an individual may exclusively possess as long as he keeps it to himself; but the moment it is divulged, it forces itself into the possession of every one... Its peculiar character, too, is that no one possesses the less, because every other possesses the whole of it. That ideas should freely spread from one to another over the globe... seems to have been designed by nature.
— Thomas Jefferson, Letter to MacPherson, August 13, 1813
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