Quote from James Madison,
"From this view of the subject, it may be concluded, that a pure Democracy, by which I mean a society, consisting of a small number of citizens, who assemble and administer the Government in person, can admit no cure for the mischiefs of faction. A common passion or interest will in almost every case, be felt by the majority of the whole; a communication and concert results from the form of government itself; and there is nothing to check the inducements to sacrifice the weaker party, or an obnoxious individual. Hence it is, that such Democracies have ever been spectacles of turbulence and contention; have ever been found incompatible with personal security, or the rights of property, and have in general been as short in their lives, as they have been violent in their deaths. Theoretic politicians, who have patronized this species of government, have erroneously supposed, that by reducing mankind to a perfect equality in their political rights, they would, at the same time, be perfectly equalized and assimilated in their possessions, their opinions, and their passions. "