How did our founding fathers demonstrate that they felt a trial by jury was an important right for an american citizen to possess?

- Demanding a 'Declaration for Independence.'

Explanation:

The founding fathers of America demanded the 'Declaration of Independence' for the beginning of a democratic rule in the United States and granted three major 'unalienable rights' of 'life as well as liberty along with the pursuit of joy and happiness' to all its citizens. The declaration led the gateway for the 'Bill of Rights' in the U.S. Constitution that granted a number of rights to its citizens. These rights included the right to 'jury trial' under the amendments VI and VII of the United States Constitution. Thus, 'demanding a declaration for independence' is the answer.