Cherry picking documents can lead to dangerous assumptions. The Declaration was based on European enlightenment thought, and during the Revolution, the same ideas were used and incorporated into what became the Articles of Confederation. The "Articles" were modified and strengthened in 1787/89 because of inherent weaknesses discovered partly in the inability of Congress to wage war between 1776-178(1/3), and then problems dealing with Shay's Rebellion that highlighted the inability of the government to deal with civil unrest/insurrection/rebellion. The Constitution was not meant to completely replace the Articles as it was meant as a way to strengthen the government's ability to perform in a functional manner. A stronger central government was inherent within the convention delegates discussions, and that was the intent when sent to the states for ratification. This means, you shouldn't stop with the Declaration because American political thought continued to change and develop over time, and has still continued to do so long past 1789.