What does it mean in the declaration of independence by "people are endowed by their creator with certain unalienable rights?"

This line of text in the DOC refers to Natural Rights, an idea originally imposed by John Locke -- one of the famous Enlightenment thinkers.

Natural Rights are rights that all men/women are entitled to -- meaning they can't be taken away by any kings or dictators.

When most people think natural rights they also think: Life, Liberty, and Property. In the DOC, this was changed to "Life, Liberty, and The Pursuit of Happiness.

facts: the 14th amendment

the 14th amendment addresses citizenship rights and equal protection of the laws.

the 14th amendment was intended to protect the rights of former slaves after the american civil war.

the 14th amendment was approved by congress in june of 1866 and ratified by the states on july 9, 1868.

the 14th amendment establishes that all persons born in the united states are citizens and are guaranteed all the rights of citizenship.

the 14th amendment establishes that the law protects all citizens equally.

in this case the passage of the 14th amendment   that was violated was the last part in which it states that there is equal protection of the law.