Why did the framers make it possible to change the constitution but difficult to do so?

The founding founders of the US made it difficult for the US constitution to be changed, because they wanted a unified country from 13th different colonies.

The US constitution is very much static.

Explanation:

The founding founders of the US made it difficult for the US constitution to be changed, because they wanted a unified country from 13th different colonies.

Some of the requirement for an amendments of the constitution includes:

A two third vote of approval from both houses of congress, or request from two third of state legislatures to call a national convention.