The founders placed a great amount of emphasis on individual states as the centerpiece of the new system. Did they place too much emphasis on the states? Or not enough? Does it still make sense to emphasize the state as the main unit of representation, or does something else make more sense today?

I think the founding fathers placed the needed attention

Explanation:

I believe they put enough attention to the state as the primary political system. See, the concept of state is based on the idea of individual freedom, and in this case, the state acts as a moderator of the issues. Without it, there will be anarchy.  However, once the state begins to accumulate power, that's the moment the citizens have to fight against it. That's why I believe the founding fathers thought carefully about what kind of state they wanted for the new nation. A limited one, and still useful. And yes, the state still is worth, because is a trustful political organization, easy to understand and to maintain.

australian plates collided into eurasian plates, and the himalayas formed. the andes mountain range the himalayas and the islands of japan form differently. the andes mountain range formed at the convergent boundary of an oceanic plate and continental plate.

because the earth is a round globe. but that is just what they tell us it is flat and those dudes actually where lying they sailed east.