Constitution<span> of the United States, </span>Articles I, II, and III<span>. To implement these abstract ideas, the Founders established three branches of government—the executive, the legislative, and the judicial. The functions of these branches are described in the first three </span>articles<span> of the </span>Constitution<span>.</span>
The Roman Tetrarchy. Tetrarchy refers to the establishment by the Roman Emperor Diocletian of a 4-part division of the empire. Diocletian understood that the huge Roman Empire could be (and often was) taken over by any general who chose to assassinate the emperor.
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