The delegates elected George Washington to preside over the Convention. ... As history played out, the result of the Constitutional Convention was the United States Constitution, but it wasn't an easy path. The drafting process was grueling. They wanted the supreme law of the United States to be perfect.
To come to peace you would have to change the mind of almost every powerful person in the countries at war. It would be easier to end the war because it is easier to use force than to use opinion.