Smith demonstrated that the United States Ordnance Department was the prime mover in bringing about machine-made interchangeable parts production of small arms.
It was here where Machiavelli wrote his most famous piece, The Prince. One of the first and main topics discussed in The Prince outlines the rest of the issues mentioned in the books, which are the various kinds of government and how they are established.
Machiavelli is most famous for a short political treatise, The Prince, written in 1513 but not published until 1532, five years after his death. Although he privately circulated The Prince among friends, the only theoretical work to be printed in his lifetime was The Art of War, about military science.