The central and binding core of a republic is a code of laws, or what we today call a constitution. The Mongol republic, which conquered half the known world at the time, was founded on the code of law of Genghis Khan in 1206. The republic of William and Mary was founded on the English Bill of Rights of 1689. The American Republic is founded on the Constitution of 1791.
Republics are self-governing institutions, because republicans are independent people and they recognize that the law is the source of their independence, and that it is in their best interests to obey and to support that law. A republican's only need for government is to enforced the law on those who threaten his liberty by disregarding the law.
Aristocrats hate republicanism, because republicans adhere to the law, and law is anathema to an aristocrat. Aristocrats believe that they are above any man-made law and that they are uniquely equipped and divinely endowed to rule by fiat over their less politically empowered contemporaries, the republicans. It should surprise no one that these two philosophies have been at war with each other since man invented agriculture and civilization 10,000 years ago.
If we examine democracy closely, we find that it is actually a religion, and like all religions, it is based on a creed – a set of core beliefs – that is as inviolable to a democrat as the law is to a republican. It is as impossible, for example, for a democrat to rethink wealth redistribution as it would be for a Catholic to rethink the divinity of Christ. These are beliefs central to the faith, and to question them would be blasphemy. There are as a result wide areas, as there are in all religions, in which democrats are incapable of independent and innovative thinking.
Both republicans and aristocrats, on the other hand, are pragmatists who learn from their mistakes and change their thinking to conform to their current goals, which for republicans is personal enrichment through innovation and progress and for aristocrats is the theft of the wealth produced by the republicans. Democrats, having few goals beyond the preservation of the security and comfort of childhood, have little incentive to change their thinking and are generally unconcerned with and largely unaware of the conflict between republicans and aristocrats.
In their continuing war with republicans, the aristocrats have traditionally used democracy as a weapon. In the early millennia of the agricultural revolution, the landed aristocrats used the democratic institution of religion to convince the republicans that it was the will of one or another god that republicans should work to support the aristocrats. Modern aristocrats use democracy to cement their aristocratic positions in Washington or in their respective State capitals by buying votes with food stamps and highway funds and by creating artificial threats to "the hallowed institution of democracy" through divisive propaganda.
Aristocrats use democracy as a shield to obfuscate their activities and their true intentions. Pursuant to that objective, they promulgate the myth of dissension between democrats and republicans. There is no such animosity between republicans and democrats except in the minds of democrats who have bought into this deception. A republican doesn't really care if you are a democrat – or whatever else your religion may be. Republicans have bigger fish to fry than arguing religion, and they know that democrats are not their enemy in any case. Their enemy is the aristocrats. Democrats are only a tool that the aristocrats use in their attempt to destroy whatever stands between them and total control of republicans.