Why do you think Americans value the ideas of liberty, equality and justice?

After the Renaissance, people were enlightened and stood against the traditional authority of the monarch to rule. In order to get rid of the tradition of the king rule which brought chaos and destruction, a need for central government was necessary.

Individual freedom was important as each and every person's right cannot be neglected in a democratic country. Liberty was required for the free man to take decisions. And Equality was important so that the rich doesn't get richer and poor doesn't get poorer.