As a goal of the US Constitution, what does it mean to "ensure domestic tranquility and provide for the common defense"?

One of the goals of the United States Constitution that is put as "ensure domestic tranquility and provide for the common defense" means that the citizens are to be given the rights that they deserve and those again are to be protected.

Explanation:

There are in all six goals that are mentioned in the preamble of the Constitution. The major responsibilities of the central and the state governments have been broadly enumerated by the Constitution itself. The preamble of the United States Constitution clarifies most duties of the government as well as directs the government to take up certain responsibilities pertaining to the protection of the citizens and their rights.