You can consider it to be Isolated. The doctrine was about preventing anyone from Europe from participating in political activities in the new land, and it was proclaimed that any European force that tried to control or colonize countries in the new land would be considered to be unfriendly to the US and the US would help the countries under attack.
European powers were running out of places to colonize in africa, while trade in East Asia was becoming more and more profitable, but the cost in time and money of traveling all the way around africa and through the india ocean (or the long trek down the silk road) was hampering European profits off of trading. So the Spanish sent Columbus to find a shorter root to Asia. Columbus didn't set out looking for America, it was just a happy accident.
Answer: "What is the primary responsibility of the legislative branch?"
Explanation: The legislative branch makes all laws, declares war, regulates interstate and foreign commerce and controls taxing and spending policies.
I hope this helps you and answers your question correctly. i believe the answer is the Dark Age.
Could you expound on what this is in relation to? I would be glad to help, I'm just unsure who Hector is, haha.