Why is the word "democracy" not in the preamble of the US Constitution?

Why? Try these on for size:

Another tendency, which is extremely natural to democratic nations and extremely dangerous, is that which leads them to despise and undervalue the rights of private persons.

—John Adams

Why do people hate on Serena (anime character)? What did she ever do to anyone except be a good friend to Ash Ketchum and an awesome trainer herself?

I do not say that democracy has been more pernicious on the whole, and in the long run, than monarchy or aristocracy. Democracy has never been and never can be so durable as aristocracy or monarchy; but while it lasts, it is more bloody than either.

—Alexis de Tocqueville

To blacks: “You can’t drink from that water fountain… eat in this cafeteria… ride this bus… go to this school. We voted fair and square and your side lost.

What would happen if the Soviet Union had simply annexed Manchuria after World War 2 or kept it independent as a puppet state allied them and separate from China as China was too weak too oppose it anyway?

—Benjamin Franklin

Majority-rules democracy is the way that majorities run roughshod over minorities, destroying rights and all ideas of equality under the law. No fair-minded person wants anything to do with democracy.

To slaves: “You can forget your notions of freedom. We voted fair and square and your side lost.”

Why do Darwin atheists not like facts of Genesis? I’ve noticed they block and dismiss everything a person states. Is that how science works to hide when a truth comes at them?

When the people find they can vote themselves money, that will herald the end of the republic.

In other words, our Founding Fathers and other Whig intellects of that time well understood that democratic methods are the surefire means to do serious damage to the rights guaranteed under republican self-government.

Meanwhile, when the Democratic Party formed in 1828, it was with a Tory outlook keen on robbing others of their rights:

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The republican is the only form of government which is not eternally at open or secret war with the rights of mankind.

—Thomas Jefferson

[with republicanism being the rights-protecting form of governance afforded us by our Constitution]

Why do all the stupid people think Donald J. Trump is stupid?

To Indians: “Pack up what belongings you can carry and start walking to Oklahoma. Your fertile lands are ours now. We voted fair and square and your side lost.”