The individual states loved the Articles of Confederation<span> because the document gave the states complete sovereignty and left the Federal </span>Government<span> powerless</span><span>. Shay's Rebellion let the states see the </span>need<span> for a stronger central </span>government<span>; so the Articles were replaced </span>with<span> the U.S. Constitution </span>
People were initially happy with the Articles of Confederation, mostly because they had just left the American Revolution War and feared a strong central government. The Articles provided that, they designed a weak central government with few or none powers at the same time it gave most of the power to the States government, which was a public demand.
The problem was that with time, the Articles showed its problems which eventually started to bother people with economic chaos and political confusion because of the weak central government. With Shay's Rebellion, people started to notice that a strong central government was needed and the Articles lost its supporters.
Heian period, in Japanese history, the period between 794 and 1185, named for the location of the imperial capital, which was moved from Nara to Heian-kyō (Kyōto) in 794.
Although opportunity cost is definitely important, it is hard to put a "price" on the opportunity in many cases, which makes it unmeasurable. This is why economists focus almost exclusively on price.
