A Classical Republic, (Greek: πολιτεια; Latin: respublica) is a "mixed constitutional government". This
definition of the form of a republic existed from Classical Antiquity
to the French Revolutionary period. Since that time, the term republic has been confused with the term democracy.
A republic, in the classical form, is a type of government that is made up of a mixture of elements from three other types of government: monarchy, aristocracy, and democracy. There is the Spartan model, which is a tripartite form of government which is a combination of kings, gerousia (aristocracy) and the assembly of all the males (democratic body). There is the Roman model that has a civilian head, and an aristocratic body which is the Senate and smaller assemblies representing the citizens. A republic is marked by a bicameral legislative body (the upper house being aristocratic) and by a written constitution that marks out the duties and responsibilities of the different bodies.
The classical republic or 'mixed government' is a product of the cultural mindset of the Indo-European races of trifunctionality1 and by and large, generated by citizen/soldier/farmer societies. It was first developed by the Doric Greeks on the island of Crete. 11 It is a by-product of the special Doric Cretan mentality of syncretism (which "Crete" forms the central portion of the word).62 "What the Dorians endeavoured to obtain in a state was good order, or cosmos, the regular combination of different elements." 58
Because of the character of the Anglo-Saxons,1 Britain in the 13th century naturally evolved into the structure of a classical republic mirroring the Spartan model. 2 The old English word "Commonwealth" is same as the Latin word Res publica. 57 The Founding Fathers of the United States modelled America along the same lines as her mother country, Britain, and the Roman Republic with her civilian head. Since the 1920's, there have been no governments that are 'mixed'.
Mentality between republic and democracy
Aristotle does not use the word democracy and republic interchangeably; neither does Socrates in Plato's Republic.
Aristotle defines a republic as the rule of law. "...it is preferable for the law to rule rather than any one of the citizens, and according to this same principle, even if it be better for certain men to govern, they must be appointed as guardians of the laws and in subordination to them;... the law shall govern seems to recommend that God and reason alone shall govern..." 21 Thomas Jefferson beseeched his countrymen to "bind men down from mischief by the chains of the constitution". 61
A democracy's mentality is that the people are sovereign and have become a law unto themselves wherefore the phrase vox populi, vox dei. The mentality of Despotism, as it can be seen in the Asian kings of the Pharoahs, Babylonians and Persians, Alexander the Great, his successors and the Roman Emperors starting with Julius Caesar, is that the king or Emperor makes the law so he is God. For the Spartan mindset, the Law, the golden mean, is to rule not men collectively or singly as the Spartan King advises Xerxes at the Battle of Thermopylae, to wit, "The point is that although they're free, they're not entirely free; their master is the law, and they're far more afraid of this than your men are of you. At any rate, they do whatever the law commands...". 38 A man's obedience, loyalty, and fidelity lie in the law and not in persons; the Spartan mindset being, "I'm obedient to the law but under no man". 64
Aristotle notices that a democracy puts the people above the law: "men ambitious of office by acting as popular leaders bring things to the point of the people's being sovereign even over the laws." 22
When the law loses respect, Aristotle says in V vii 7 that "constitutional government turns into a democracy". And in that situation, Socrates, Plato and Aristotle fear the possibility that "Tyranny, then arises from no other form of government than democracy." Then, democracies are no more than ochlocracies. In more recent times, Huey Long said that when fascism came to the United States it would call itself "democracy". 23 See The Kyklos.
http://www.debatepolitics.com/us-constitution/186640-democracy-and-republic-w-172-a.html