Why might our Nation's founders have created a process for changing the Constitution?

The US Constitution.
The Constitution of the United States has stood the test of time. Think about all the technological, social, economic, and political changes that have occurred in our nation since the Constitution was originally written. There were no cars, planes, phones, computers, or even electricity in 1787. As the nation has changed over time, the government can adapt because the Founding Fathers made the Constitution flexible. This flexibility has allowed the document to remain relevant in modern society while holding the government to a framework that protects rule of law and limited government.

france,russia and prussia had absolute monarchy and it meant:

no sharing of powerbuild large large militaryestablish religious uniformity..

when louis xiv inherited the throne, he was able to serve as his chief minister.louis xiv ruled as an absolute monarch.