Slavery started because people couldn't do their jobs themselves, so they had other people do it for them.
One audience for the Declaration of Independence was the American colonists. In the document, Jefferson lays out the argument for forming a new nation. He lists the goals of the new government—this will be a government that will safeguard the people's natural rights of life, liberty, and the pursuit of happiness.
Answer:
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.