Noah Webster identified the fundamental problem in the Articles of Confederation as the inability of the states to work together effectively, leading to self-interest overriding the collective good. His assertion that "so long as any individual state has power to defeat the measures of the other twelve" reflects the concern that states would prioritize their own interests over the nation as a whole. Therefore, the correct answer is:
- that states would always work in their own self-interest even if it meant harm to the nation as a whole.