Our Constitution created a limited representative republic. A republic is different from a democracy. In a democracy, the majority can directly make laws, while in a republic, elected representatives make laws. Basically, in a pure democracy, the majority has unlimited power, whereas in a republic, a constitution limits the majority and provides safeguards for the individual and minorities.
John Adams wrote that “There never was a democracy yet that did not commit suicide,” and James Madison wrote in Federalist 10 that “Democracies have, in general, been as short in their lives as they have been violent in their deaths.” The reason pure democracies fail is that majorities learn that they can legally take property and/or liberties away from others. Those subjected to abuse can be anyone outside the majority coalition, and their minority status can be based on race, sex, religion, wealth, political affiliation, or even which city or state they reside in. Demagogic leaders become adept at appealing to the emotions of jealousy, avarice, and entitlement. They also denigrate opponents in order to justify prejudicial actions taken by the majority. Soon, oppression of minority classes causes enough conflicts to collapse the democratic process.