This excerpt explains why the Articles of Confederation needed to be fixed or replaced with a different constitution. The excerpt goes over several different flaws in the Articles of Confederation including:
1) No national courts to solve issues between individuals from different states.
2) No consistency in laws- In other words, states got to interpret the laws whatever way they wanted.
3) No way to enforce court rulings from state to state.
These weaknesses, plus others, resulted in the need for a new constitution. The US Constitution replaces the Articles of Confederation and is still what we follow today.
It wont let me answer, I’ll put my answer in the comments
The name for this idea is "Domino Effect" - this is a theory that says that if one country falls to Communism the neighboring countries would also fall to Communism, much like pieces of Dominos fall when a neighboring piece fell.
This theory was important in the Foreign politics of the US during the cold war.
