books.google.de - Was there ever a time when a civilization, technically sophisticated, and in full possession of its senses, reverted to earlier, less advanced technology? You bet - Japan, 1543-1879. During this period Japan effectively prohibited all manufacture of firearms and gunpowder, and isolated itself from the...http://books.google.de/books/about/Giving_Up_the_Gun.html?hl=de&id=4Ete0zPAnjwC&utm_source=gb-gplus-shareGiving Up the Gun
