The Constitution of the United States of America was made in 1789 making it the oldest constitution in the modern world.
However, as time passed by, the United States continued to develop in terms of science and technology and faced unique challenges that the framers of the constitution could not have expected and foreseen.
Thus, they researched and found a solution: the citizens could make changes to the constitution.
Hence, they added a process to amend or change the constitution and since 1789, the U.S. has added 27 amendments into their constitution.
Explanation: Americans needed to conserve what they had because it was extermely hard to get some stuff because a lot of it was being sent to the Front Lines.