The Declaration of Independence included a list of grievances in order to show the world why the American colonists were breaking away from Great Britain. Within this list of grievances, the American colonists discussed several different topics including no taxation without representation.
After the French and Indian War, the British government turned to the colonies for revenue to help pay off their debt. This was considered unfair to the colonists, as they had no representation in the British parliament (aka the people passing the taxes). This was one of several disagreements that ultimately resulted in the American Revolution.
To settle America and make a new and better place and break away from the harsh British government.
They were more free in spirit.
Congress felt the need for a stronger union and a government powerful enough to defeat Great Britain, so that's why they made The Articles of Confederation.